Copyright Amendments Act of 1991. Hearings on H.R. 2372, Copyright Amendments Act of 1991: Fair Use of Unpublished Works, Copyright Renewal, and National Film Preservation before the Subcommittee on Intellectual Property and Judicial Administration of the Committee on the Judiciary. House of Representatives, One Hundred Second Congress, First Session (May 30, June 6, 12, and 20, 1991).