ERROR to the Circuit Court for the Southern District of New York. At the October term 1829, of the circuit court, the plaintiff in error, Joseph Shaw, instituted an action against the defendant, Joseph Cooper, for an alleged violation of a patent granted to him by the United States, dated the 7th of May 1829, for 'a new and useful improvement in guns and fire-arms, which improvement consisted in a priming-head and case applied to arms and fire-arms, for the purpose of priming and giving them fire, by the means or use of percussion, fulminating or detonating powder;' by which patent, the plaintiff alleged that there was granted to him, &c., for the term of fourteen years from the 19th of June 1822, the exclusive right to the said invention, and by virtue of which, he became entitled to the same, for the residue of the term unexpired on the 7th day of May 1829. The declaration averred, that the defendant had violated the patent-right of the plaintiff, on the 1st day of August 1829, and afterwards, between that day and the institution of the suit.
The defendant pleaded not guilty, and gave the following notice of the matters of defence. 'Please to take notice, that on the trial of the above cause, the above-named Joseph Cooper will, under the plea of the general issue aforesaid, insist upon, and give in evidence, that the pretended new and useful improvement in guns and fire-arms, mentioned and referred to in the several counts of the said Joshua Shaw's declaration, was not originally discovered or invented by the said Joshua Shaw; also, that the said pretended new and useful improvement, or the material or essential parts or portions thereof, or some or none of them, had been known and used in this country, viz., in the city of New York, and in the city of Philadelphia, and in sundry other places in the United States, and in England, and in France, and in other foreign countries, before the said Joshua Shaw's application for a patent, as set forth in his said declaration; and also, before the alleged invention or supposed discovery thereof by the said Joshua Shaw. And further, that the said alleged new and useful improvement, or the material or essential parts or portions thereof, or some or one of them, or the principle thereof, was the invention or discovery of a gunmaker, or of some other person, residing in England. And further, that the said patent was void, because, in and by the specification or description therein referred to, no distinction or discrimination is made between the parts and portions previously known and used as aforesaid, and any parts or portions of which the said Joshua Shaw may be the inventor or discoverer; the said Joseph Cooper, at the same time, protesting, that he, the said Joshua Shaw, has not been the inventor or discoverer of any part or portion of the said alleged improvement. And further, that the said patent is void, because the said specification or description does not describe the improvement of which the said Joshua Shaw claims to be the inventor or discoverer, in such full, clear and exact terms, as to distinguish the same from all other things before known, nor so as to enable a person skilled in the art or science of which it is a branch, or with which it is most nearly connected, to make and use the same. And further, that the said patent is void, because it was not granted, issued or obtained, according to law. And further, that the said patent is void, because it was surreptitiously obtained by the said Joshua Shaw.'
The cause was tried in January 1832, and a verdict and judgment given for the defendant. The plaintiff prosecuted this writ of error. The following bill of exceptions was tendered by the counsel for the plaintiff, and sealed by the court.
'The plaintiff, to maintain the issue on his part, gave in evidence the letters-patent of the United States of America, as set forth in the declaration of the said plaintiff, issued on the 7th day of May 1829; and also that the improvement for which the said letters-patent were granted, was invented or discovered by the said plaintiff, in the year 1813 or 1814, and that the defendant had sold instruments which were infringements of the said letters-patent. And thereupon, the said defendant, to maintain the said issue above joined on his part, then and there proved by the testimony of one witness, that he had used the said improvement in England, and had purchased a gun of the kind there, and had seen others use the said improvement, and had seen guns of the kind in the Duke of York's armory, in 1819; and also proved by the testimony of five other witnesses, that, in 1820 and 1821, they worked in England, at the business of making and repairing guns, and that the said improvement was generally used in England in those years, but that they never had seen guns of the kind prior to those years; and also proved, that, in 1821, it was known and used in France, and also that the said improvement was generally known and used in the United States of America, after the 19th day of June 1822. Whereupon, the said plaintiff, further to maintain the said issue on his part, then and there gave in evidence, that the said plaintiff, not being a worker in iron, in 1813 or 1814, employed his brother, in England, under strict injunctions of secrecy, to execute or fabricate the said improvement, for the purpose of the said plaintiff's making experiments. And that the said plaintiff, afterwards, in 1817, left England, and came to reside in the United States of America; and that, after the departure of the said plaintiff from England, viz., in 1817 or 1818, his said brother divulged the said secret, for a certain reward, to an eminent gun-maker in London; that the plaintiff, on his arrival in this country, in 1817, disclosed his said improvement to a gunmaker, whom he consulted as to obtaining a patent for the same, and whom he wished to engage to join and assist him. That the plaintiff made said disclosures, under injunctions of secrecy, claiming the improvement as his own, and declaring that he should patent it. That the said plaintiff treated his invention as a secret, after his arrival in this country, often declaring that he should patent it; and that he assigned as a reason for delaying to patent it, that it was not so perfect as he wished to make it, before he introduced it into public use; and that he did make alterations in his invention, up to about the date of his patent, which some witnesses considered as improvements, and others did not. That, in this country, the said invention was never known or used, prior to the said 19th day of June 1822; that, on that day, letters-patent were issued to the said plaintiff, being then an alien, for his said invention; and that the said plaintiff immediately brought the said invention into public use under the said letters-patent. That afterwards, and after suits had been brought for violation of the said letters-patent, the said plaintiff was advised to surrender them, on account of the specification being defective, and that he did accordingly, on the 7th day of May 1829, surrender the same into the department of the secretary of state of the United States of America; and that, thereupon, the letters-patent first above mentioned were issued to the said plaintiff.
'And the said plaintiff also gave in evidence that, prior to the said 19th day of June 1822, the principal importers of guns from England, in New York and Philadelphia, at the latter of which cities the plaintiff resided, had never heard anything of the said invention, or that the same was known or used in England; and that no guns of the kind were imported into this country, until in the years 1824 or 1825. And that letters-patent were granted in England, on the 11th day of April 1807, to one Alexander J. Forsyth, for a method of discharging or giving fire to artillery, and all other fire-arms; which method he describes in his specification as consisting in 'the use or application, as a priming, in any mode, of some or one of those chemical compounds which are so easily inflammable as to be capable of taking fire and exploding, without any actual fire being applied thereto, and merely by a blow, or by any sudden or strong pressure of friction given or applied thereto, without extraordinary violence; that is to say, some one of the compounds of combustible matter, such as sulphur or sulphur and charcoal, with an oxmuriatic salt; for example, the salt formed of dephlogisticated marine acid and potash (or potasse), which salt is otherwise called oxmuriate of potash; or such of the fulminating metallic compounds as may be used with safety; for example, fulminating mercury, or of common gunpowder, mixed in due quantity with any of the above-mentioned substances, or with any oxmuriatic salt as aforesaid, or of suitable mixtures of any of the before-mentioned compounds;' and that the said letters-patent continued in force for the period of fourteen years from and after granting of the same. (It is understood that the patent and specification of Forsyth, may be at any time referred to on the argument, for correction or explanation of the bill of exceptions.) And thereupon, the defendant, further to maintain the said issue on his part, gave in evidence a certain letter from the plaintiff to the defendant, dated in December 1824, from which the foling is an extract, 'some time since, I stated, that I had employed counsel respecting regular prosecutions for any trespasses against my rights to the patent; I have at length obtained the opinions of Mr. Sergeant of this city, together with others eminent in law, and that is, that I ought (with a view to insure success) to visit England, and procure the affidavits of Manton and others, to whom I made my invention known, and also of the person whom I employed to make the lock, at the time of invention; for it appears very essential, that I should also prove that I did actually reduce the principle to practice, otherwise, a verdict might be doubtful. It is, therefore, my intention to visit England, in May next, for this purpose; in the meantime, proceedings which have commenced here are suspended for the necessary time.'
'And the said judges of the said court did thereupon charge and direct the said jury, that the patent of the 7th day of May 1829, having been issued, as appeared by its recital, on the surrender and cancelment of the patent of the 19th day of June 1822, and being intended to correct a mistake or remedy a defect in the latter, it must be considered as a continuation of the said patent, and the rights of the plaintiff were to be determined by the state of things which existed in 1822, when the patent was obtained. That the plaintiff's case, therefore, came under the act passed the 17th day of April 1800, extending the right of obtaining patents to aliens, by the first section of which, the applicant is required to make oath, that his invention has not, to the best of his knowledge or belief, been known or used in this or any foreign country. That the plaintiff, most probably, did not know, in 1822, that the invention for which he was taking out a patent, had, before that time, been in use in a foreign country; but that his knowledge or ignorance on that subject was rendered immaterial, by the concluding part of the section, which expressly declares, that every patent obtained pursuant to that act, for any invention which it should afterwards appear had been known or used, previous to such application for a patent, should be utterly void. That there was nothing in the act confining such use to the United States; and that, if the invention was previously known in England or France, it was sufficient to avoid the patent, under that act. That the evidence would lead to the conclusion, that the plaintiff was the inventor in this case; but the court were of opinion, that he had slept too long on his rights, and not followed them up, as the law requires, to entitle him to any benefit from his patent. That the use of the invention, by a person who had pirated it, or by others who knew of the piracy, would not affect the inventor's rights, but that the law was made for the benefit of the public as well as of the inventor; and if, as appeared from the evidence in this case, the public had fairly become possessed of the invention, before plaintiff applied for his patent, it was sufficient, in the opinion of the court, to invalidate his patent, even though the invention may have originally got into public use, through the fraud or misconduct of his brother, to whom he intrusted the knowledge of it.'
The case was submitted to the court, on printed arguments, by Paine, for the plaintiff in error; and Emmet, for the defendant.
For the plaintiff in error, it was contended, that the case fell within the principles which had been uniformly acknowledged and supported in the circuit court of the United States; and which were not intended to be disavowed, but sanctioned by this court, in Pennock v. Dialogue, 2 Pet. 1. In this country, many strong cases of public use, prior to the application for a patent, have been brought before the courts, where the public had been long in possession; and the courts have allowed the inventor to show, in different ways, that he had not thereby abandoned his use to the public. How much more favorable to us are the circumstances of our case, as respects a prior use. Before we took out our first patent, the invention had never been seen nor heard of in this country. It was not then known to ourselves, nor to any others in this country, that it had been used in England; and it had been so used only one or two years-a short period, compared with the many cases which have been sustained by the courts. Even if this use had been an American use, it would not have been an extraordinary one. But it was not an American, but a foreign use; and therefore, not a use by the public, who contest our exclusive right, by saying, that they had become the innocent possessors of our invention. No one of that public had gotten possession of it.
The case does not seem to be fairly stated, when it is said that, although the invention was disclosed by piracy, yet the public have innocently gotten possession of it by that means. The only public who can set up the innocence of their possession as against us, did not get their possession by the piracy; but under the invalid patent. And if this be so, what difference does it make, that afterwards guns were brought from England? Does such a circumstance bear, can it be made to bear, at all upon the merits of the case?
The parts of the charge to the jury of the circuit court which are objected to, as understood by the counsel for the plaintiff, may be stated thus: That the use of the invention abroad, acquired through a fraudulent or piratical disclosure of the secret, for a period of only one or two years before the application for the patent, and that use entirely unknown to the inventor here, avoids the patent, because it was obtained under the alien act. That our patent of 1829, obtained under the citizen's act, is, in respect to the prior foreign use, to be construed as if obtained under the alien act, because it was obtained on the surrender of the patent of 1822, which was obtained under the alien act, the one being only a continuation of the other. That the inventor (the court are understood to have been speaking, in this part of the charge, without reference to the question as to whether the patent was obtained under the alien or citizen's act, but to have designed their remarks to apply to patents generally), had slept too long on his rights, and not followed them up, as the law requires, to entitle him to any benefit from his patent; that the use of the invention, by a person who had pirated it, or by others who knew of the piracy, would not affect the inventor's right; but that the law was made for the benefit of the public, as well as of the inventor; and if, as appeared from the evidence in this case, the public had fairly become possessed of the invention, before the plaintiff applied for his patent, it was sufficient to invalidate his patent, even though the invention may have originally gotten into public use through the fraud or misconduct of his brother, to whom he intrusted the knowledge of it. The following points comprehend these objections to the charge of the court.
1. The second patent is original and independent, and not a continuation of the first patent. When patents are surrendered and cancelled in England, they are entirely vacated and gone, and as if they had never existed; and the king can grant out the right, de novo, either to the same or to any other person. 17 Vin. Abr. 114, Prerogative of the King, R. b, § 9; Ibid. 151, Prerogative, &c., M. c, § 2-4, 6, 10, 14; Godson on Pat. 200; Com. Dig. 'Patent,' G. If this is the effect of a surrender there, it must be the same here. Not a dictum can be found in the English books, that a second patent is a continuation of the first. No such idea can be found in our own books, although cases of surrender have come before our courts. The right of an inventor to surrender an invalid patent, and take out a new one, being admitted, it follows, that if, between the two patents, he has been naturalized, he must, of necessity, take out a patent under the citizen's act; because he is no longer an alien. If he, rightfully, takes a patent under the citizen's act; he is entitled to all the advantages that act confers; and among them, to have his patent construed and adjudicated upon, under the provisions of that act and of no other.
2. A fraudulent or piratical use of the invention, either at home or abroad, before the application for a patent, cannot have any other or greater effect to invalidate a patent obtained under the alien act, than one obtained under the citizen's act. On general principles, it cannot; for, as to all kinds of property, no one can acquire a right to it, except by the consent of the owner. Theft or fraud can never enable one who gets possession by those means, to transfer the property. See authorities cited under next point. It is on this principle that the courts first began to construe the citizen's act, by arraying the sixth section against the first. They said, the legislature meant to provide, by the sixth section, for the exception of cases of fraud, &c., out of the too rigid and literal operation of the first section. Afterwards, the courts took a more liberal view of the act, and held that, even without the section, the legislative intention to except such cases from the first section would be presumed; and this is the docrine finally settled in Pennock v. v. Dialogue. The construction given by this court in the case of Pennock v. Dialogue, 2 Pet. 22, is entirely in favor of the plaintiff in error. The court there say, in that case, 'the act of 17th April 1800, ch. 25, which extends the privileges of the act of 1793 to inventors who are aliens, contains a proviso, declaring that 'every patent which shall be obtained pursuant to the act, for any invention, art or discovery, which it shall afterwards appear had been known or used, previous to such application for a patent, shall be void.' This proviso certainly fortifies the construction of the act of 1793, already asserted; for there is not any reason to suppose, that the legislature intended to confer on aliens privileges essentially different from those belonging to citizens; on the contrary, the enacting clause of the act of 1800 purports to put both on the same footing, and the proviso seems added as a gloss, or explanation of the original act.' Now, the proviso is the only thing in the alien act which can make it all different in this particular from the citizen's act; and the courts say, that it does not make any difference, but merely expresses more fully what was the meaning of the citizen's act.
3. If an invention has been pirated or fraudulently divulged, the inventor cannot thereby lose his right to his own invention and property; and it makes no difference, that the public have acquired the use of the invention, without any participation in the fraud, unless the inventor has acquiesced in such use; the only principle to be found in the American decisions on this subject being, that a public use does not affect the inventor's right, unless it proves that he has dedicated or abandoned his invention to the public. And in this case, there is no evidence of such delay or neglect as would amount to an abandonment, nor of any intention to dedicate the invention to the public. It is a general principle, as to all kinds of personal property, that even a bon a fide purchaser, for a valuable consideration, can never acquire property of which another has been deprived by fraud, theft or violence, or even by a bailment. 1 Wils. 8; 2 Str. 1187; 3 Atk. 44; 1 Salk. 283. In this respect, no difference has ever yet been made between a man's property in his inventions, and his other property; and there seems to be no reason or principle making a distinction.
The statute of Massachusetts securing copyrights (before the federal Union) begins with a preamble, declaring that 'no property is more peculiarly a man's own, than that which is produced by the labor of his mind.' 1 Dane's Abr. 527. In Millar v. Taylor, 4 Burr. 2303, seven judges against four held, that at common law, the author of a literary composition did not lose his right by publishing it, So far, then, as the natural rights of men to this species of property (copyright), independently of statuory provisions, are in question, they retain all their rights to such proproperty, notwithstanding the public have innocently gotten possession of it, and even with the author's consent; and there surely can be no difference, when we go back to natural rights at common law, whether the property is the subject of a copyright or of a patent; whether it be a book or a machine; the public, having gotten the use or possession, must have as much right to make copies of the book as of the machine; both are the product of the mind. This view is taken merely to show that this species of property has been treated as subject to the same rules of law as other kinds of property, i. e., except so far as the statute makes a difference. Now, it is admitted, that under the statute, neither the pirate, nor any one participating in his piracy, can acquire any rights against the inventor. And why? Because the same rules of justice which apply to all other kinds of property, are applied by the courts to this, as being the intention of the statute, although against its letter. But why stop at the pirate, and say, that you will not extend the rule to the public, when they have innocently gotten the possession? Do you stop thus, as to other kinds of property? No! You say, no one, however innocent of the fraud, can become the lawful proprietor. Why, then, not carry the principle to its full extent? How can it be inferred, that the statute intends to go a part of the way of a general principle, and there stop? The principle is a rule drawn by analogy from other kinds of property, on the ground, that the analogy being general, the rule should be so too. But the analogy is also complete between this and other kinds of property, and the rule ought, therefore, to be complete, and applied in its full extent. But there is even a stronger reason why this principle of law should be applied to this species of property in its full extent, rather than to the case of a bon a fide purchaser of any other kind. There he has paid a consideration, an equivalent. It is a hard case-one of two innocent persons must suffer. Not so here. What does the public lose? That which has cost it nothing-for which it has given no equivalent; and all we seek of them is the consideration, the equivalent, which they have never yet paid to any one.
But if we examine the American cases on this subject, prior to Pennock v. Dialogue, we shall find, that the principle has always been applied to inventions, in its full extent. The counsel then proceeded to examine the following cases, and argued, that they fully sustained the principles claimed for the plaintiff in error. Whittemore v. Cutter, 1 Gallis. 482; Goodyear v. Mathews, 1 Paine 301; Morris v. Huntington, Ibid. 354; Mellus v. Silsbee, 4 Mason 108; Treadwell v. Bladen, 4 W. C. C. 703.
The bill of exceptions says, 'that the plaintiff assigned as a reason for delaying to patent it (the invention), that it was not so perfect as he wished to made it, before he introduced it to public use; and that he did make alterations in his invention, up to about the date of his patent, which some witnesses considered as improvements, and others did not.' This was sufficient to account for the delay; and it is unimportant, whether the alterations were improvements or not; for he was trying to make them, and said, that was his motive for the delay; and the motive for the delay is the only question. 1 Paine 354. The patent granted to Forsyth, in England, which gave him the exclusive right to use the percussion powders in any mode, down to April 1821, accounts for our not taking out a patent in England.
Finally, the counsel for the plaintiff in error contended: 1. That if the rights of the patentee were the same as under an ordinary citizen's patent, then he had never dedicated or abandoned his invention to the public; and that there had been no use of it which invalidates his patent. 2. That his rights were the same as those under an ordinary citizen's patent; the patent having been granted under the citizen's act, and not being affected by the previous vacated patent. 3. That even if he is to be considered as having a patent under the alien act, his rights, under the circumstances of this case, are the same as if it were a citizen's patent.
In conclusion, he remarked, that the jury found their verdict entirely under the charge of the court, considering that the charge, as to the points of law, precluded them from finding a verdict for the plaintiff; however well they might be satisfied upon every matter of fact. It was believed the jury, as well as the court, were entirely satisfied, that the plaintiff was the inventor, and that his invention had been used, without his knowledge or suspicion; and that he had never disclosed it, except in confidence, and under the strictest injunctions of secrecy.
The letter from plaintiff to defendant should not have been put in the bill of exceptions, because it only presented questions of fact purely, not affecting any of the points of law on which the court charged the jury. This court will not regard a mere isolated fact, when it is apparent, that all the facts of the case are not given, but only such as are essential to show how the jury were charged as to the law. It is impossible for this court to say, how the jury would have found upon the whole evidence. It is sufficient to add, that the meaning of that letter was satisfactorily explained to the jury, by the plaintiff's counsel. It was explained, that the knowledge of his invention, which the plaintiff in that letter says he communicated to 'Manton and others,' was simply the knowledge of the fact, that he had made an important invention, without disclosing what it was. On any other supposition, this letter was contradicted by all the rest of the evidence in the case, and the uniform conduct of the plaintiff.
Emmet, for the defendant in error.-The bill of exceptions in this cause, discloses in substance the following case: In 1813 or 1814, the plaintiff, residing in England, invented what he claims to be secured to him by his patent. Between that time and his coming to the United States, he made his invention known to his brother, also to Mr. Manton, a gun-maker in London, and others-as is shown by his letter to defendant. In 1817, the plaintiff came to the United States, and shortly afterwards disclosed his secret to a gun-maker in Philadelphia. In 1817 or 1818, plaintiff's brother sold the secret to a gun-maker in London. In 1819, the invention was sold and used in England. In 1820 or 1821, it was in general use by the public there. In 1821, it was in general use in France. In 1822 (19th June), plaintiff took out his first patent as an alien, under the act of 1800. In 1829 (7th May), he surrendered that patent as defective, and took out a new one, with an amended specification, as a citizen, under the act of 1793, upon which patent his suit is brought.
The case also sets forth, that in April 1807, a patent had been granted in England, to one Forsyth, for an invention on the same subject, and that such patent continued in force for fourteen years, or until April 1821. This was offered by the plaintiff, and made a part of the case, for the purpose, doubtless, of accounting for his not having taken out a patent for his invention in England, previous to 1817; the terms of Forsyth's patent being, as he supposed, sufficiently comprehensive to embrace his discovery, and to tie up his hands, during its continuance. From these facts, it would, at least, appear, that the public had somewhere become fully possessed of the use of the invention, and that they had enjoyed such use for not less than about two years, before the plaintiff took any steps to obtain his first patent.
Without stopping now to inquire what should be considered as the public, in respect to a case of this kind, let us examine how far the acts of the plaintiff himself have precluded him from ever controverting the right of that public to the use of the thing in question. The principle upon which previous public use of an invention invalidates a patent, undoubtedly, is, that the inventor can no longer give any consideration or equivalent for the exclusive privilege claimed by him; and the law, to sustain a principle so necessary and just in itself, presumes an abandonment by the inventor. This abandonment may be either actual, as by voluntary dedication, or constructive, as by negligence or unreasonable delay. 1 Paine 300.
In the present case, can it be pretended, that there was neither negligence, nor unreasonable delay? The plaintiff would have it appear, that up to 1822, he was maturing his invention, and yet what he then took out a patent for, was the very thing, and no improvement upon that, which, for two or three years previous, had been generally known and used in England and France. But admitting this explanation to stand for what it is worth, how does it tally with his other ground of excuse? He says, Forsyth's patent restrained him in England. Be it so-and what is the fair inference? Why, that if it had not been for Forsyth's patent, he would have applied there for one, before 1817; and if he would, his invention was matured before he came to the United States; and nothing but his alienism stood in the way of his applying for a patent, immediately after his arrival. Being an alien, the law required him to delay two years. In 1819, therefore, he might and ought to have taken out his patent; and if he had done so, he would have anticipated the public use of the invention in England and France. But he delayed until 1822, a period of three years. His own story shows that such delay was without sufficient cause. It was, therefore, unreasonable; and the law, in protection of the right acquired in the meantime by the public, construes his acts into an abandonment.
It would appear, that, even to the mind of the plaintiff's counsel, this view of the case is conclusive, unless the fact of the invention having gotten into public use before the first patent was taken out, can be shaken; for they say, that the use, in this case, was not an American, but a foreign use, and therefore, not a use by the public who contest their exclusive right. This distinction is directly opposed to the act of 1800, which uses the language 'known or used, in this or any foreign country;' and it is equally opposed to the intent and meaning of the act of 1793. We are perfectly willing to admit, that, in this respect, the construction of both acts should be the same; and that the proviso aa the end of the first section of the act of 1800 applies to every patent, whether obtained under that act, or the act of 1793. In the words of Mr. Justice STORY, the act of 1800 affords, in this respect, a gloss or explanation of the original act. Pennock v. Dialogue, 2 Pet. 22. This only tends to show, that if the plaintiff had been a citizen in 1822, and had taken out his first patent, under the act of 1793, his case would have been just as objectionable as it is now. But where do the plaintiff's counsel find any law for such a distinction between American and foreign public use, or how bould it be sustained on principle? If the doctrine be a sound one, it would go to this extent-I dedicate my invention to the public in Europe; the European public being thus legally possessed of it, the article is manufactured and exported in large quantities; I immediately come over here, take out a patent, and prevent the use of the article in the United States, thereby prohibiting the European public from engaging in a traffic or commerce which was an immediate incident to my own grant or dedication to them. The impolicy of recognising such a distinction, would afford a sufficient argument against it, even if the terms of the statute were not explicit; and if nothing had ever fallen from the bench to give a construction to the expression 'public use.' But there is positive and high authority on this subject. Lord Chief Justice GIBBS says, 'to entitle a man to a patent, the invention must be new to the world.' 1 Holt 58. And such, we submit, is the settled law on this point.