60 STAT.] 79TH CONG., 2D SESS.-CH. 540 -JULY 5, 1946 (e) Consists of a mark which, (1) when applied to the goods of the applicant is merely descriptive or deceptively misdescriptive of them, or (2) when applied to the goods of the applicant is pri- marily geographically descriptive or deceptively misdescriptive of them, except as indications of regional origin may be registrable under section 4 hereof, or (3) is primarily merely a surname. (f) Except as expressly excluded in paragraphs (a), (b), (c), and (d) of this section, nothing herein shall prevent the registration of a mark used by the applicant which has become distinctive of the applicant's goods in commerce. The Commissioner may accept as prima facie evidence that the mark has become distinctive, as applied to the applicant's goods in commerce, proof of substantially exclusive and continuous use thereof as a mark by the applicant in commerce for the five years next preceding the date of the filing of the application for its registration. SERVICE MARKS REGISTRABLE SEC. 3. Subject to the provisions relating to the registration of trade-marks, so far as they are applicable, service marks used in commerce shall be registrable, in the same manner and with the same effect as are trade-marks, and when registered they shall be entitled to the protection provided herein in the case of trade-marks, except when used so as to represent falsely that the owner thereof makes or sells the goods on which such mark is used. The Com- missioner may establish a separate register for such service marks. Applications and procedure under this section shall conform as nearly as practicable to those prescribed for the registration of trade-marks. COLLECTIVE AND CERTIFICATION MARKS REGISTRABLE SEC. 4. Subject to the provisions relating to the registration of trade- marks, so far as they are applicable, collective and certification marks, including indications of regional origin used in commerce, shall be registrable under this Act, in the same manner and with the same effect as are trade-marks, by persons, and nations, States, municipalities, and the like, exercising legitimate control over the use of the marks sought to be registered, even though not possessing an industrial or commer- cial establishment, and when registered they shall'be entitled to the protection provided herein in the case of trade-marks, except when used so as to represent falsely that the owner or a user thereof makes or sells the goods or performs the services on or in connection with which such mark is used. The Commissioner may establish a separate register for such collective marks and certification marks. Applications and pro- cedure under this section shall conform as nearly as practicable to those prescribed for the registration of trade-marks. USE BY RELATED COMPANIES SEC. 5. Where a registered mark or a mark sought to be registered is or may be used legitimately by related companies, such use shall inure to the benefit of the registrant or applicant for registration, and such use shall not affect the validity of such mark or of its registration, provided such mark is not used in such manner as to deceive the public. DISCLAIMERS SEC. 6 . The Commissioner shall require unregistrable matter to be disclaimed, but such disclaimer shall not prejudice or affect the appli- cant's or owner's rights then existing or thereafter arising in the dis- claimed matter, nor shall such disclaimer prejudice or affect the 429 Mark distinctive of applicant's goods.