PUBLIC LAWS-CHS. 369-371-AUG. 18 ,1941 [55 STAT. leges pertaining to the same, being generally known as the insignia of the United Daughters of the Confederacy: Provided, however, That no person who has manufactured the design of said patent between the 18th day of May 1940 and the date of the passage of this Act shall be held liable for infringement of this patent by reason of the continued manufacture and sale thereof. Approved, August 18, 1941. [CHAPTER 370] August 18,1941 [H. R. 3206]1 [Public Law 221] Assignments of pat- ent applications, etc. Recording in Patent Office. Evidence of execu- tion. AN ACT To afford greater protection to the purchaser of patent rights. Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That section 4898 of the Revised Statutes (35 U. S. C. 47) be, and the same is hereby, amended to read as follows: "SEC. 4898. Every application for patent or patent or any interest therein shall be assignable in law by an instrument in writing, and the applicant or patentee or his assigns or legal representatives may in like manner grant and convey an exclusive right under his appli- cation for patent or patent to the whole or any specified part of the United States. An assignment, grant, or conveyance shall be void as against any subsequent purchaser or mortgagee for a valuable con- sideration, without notice unless it is recorded in the Patent Office within three months from the date thereof or prior to such subse- quent purchase or mortgage. "If any such assignment, grant, or conveyance of any application for patent or patent shall be acknowledged before any notary public of the several States or Territories or the District of Columbia, or any commissioner of any court of the United States for any district or Territory, or before any secretary of legation or consular officer authorized to administer oaths or perform notarial acts under sec- tion 1750 of the Revised Statutes (U. S . C ., title 22, sec. 131) the certificate of such acknowledgment, under the hand and official seal of such notary or other officer, shall be prima facie evidence of the execution of such assignment, grant, or conveyance." Approved, August 18, 1941. [CHAPTER 371] AN ACT August 18, 1941 [H. R. 40851 To extend the times for commencing and completing the construction of bridges [Public Law 2221 across the Monongahela River in Allegheny County, Pennsylvania. Be it enacted by the Senate and the House of Representatives of TMononghela eRiver the United States of America in Congress assembled, That the times bridging, in Allegheny for commencing and completing the construction of a bridge in County, Pa. Allegheny County, Pennsylvania, across the Monongahela River at a point suitable to navigation from the Borough of Dravosburg, in Allegheny County, Pennsylvania, to a point at or adjacent to the dividing line between the city of McKeesport, Pennsylvania, and the Borough of Glassport, Pennsylvania, and a bridge across the Monon- gahela River at a point suitable to navigation from the Borough of Rankin, Pennsylvania, to the Borough of Whitaker Pennsylvania, construction of which bridges was authorized by an Act of Congress 53 tat1078. approved July 25, 1939, and heretofore extended by an Act of Con- 54 Stat. T7f gress approved August 9, 1940, be, and are hereby, further extended one and three years, respectively, from July 25, 1941. Sao. 2. The right to alter, amend, or repeal this Act is hereby expressly reserved Approved, August 18, 1941. 634 Provio.
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