Public Law 91.
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/statutes-at-large/vol-64/public-law-91·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
*Public libraries, U. S. letters patent.* AN ACT To amend section 4934 of the Revised Statutes (U. S. C., title 35, sec. 78), as amended, to permit public libraries of the United States to acquire back copies of United States letters patent, and for other purposes June 15, 1950 215 550