Process patent legislation : hearing before the Subcommittee on Patents, Copyrights, and Trademarks of the Committee on the Judiciary, United States Senate, One Hundredth Congress, first session on S. 568 ... S. 573 ... and S. 635 ... April 22, 1987.
Publisher: Washington: U.S. Govt. Printing Off.,
Coverage: Washington : U.S. G.P.O. : 1987.