To increase certain patent and trademark fees : hearings before the Subcommittee No. 3 of the Committee on the Judiciary, House of Representatives, Eighty-fourth Congress, first session, on H.R. 4983 and H.R. 6175, bills to fix the fees payable to the Patent Office, and for other purposes, June 3 and 17, 1955. (U.S. Govt. Print. Off, 1955)