Process patents : hearing before the Subcommittee on Patents, Copyrights, and Trademarks of the Committee on the Judiciary, United States Senate, Ninety-ninth Congress, first session, on S. 1543, a bill to protect patent owners from importation into the United States of goods made overseas by use of a United States patented process, October 23, 1985. (U.S. G.P.O.,, 1986)