TY - BOOK TI - United States Patent Law Sesquicentennial Celebration: a record of the proceedings commorating the 150. anniversary of the signing of the 1. United States Patent Law ; 1790 - 1950 PY - 1941/// CY - Washington: PB - Government Print. Off., KW - USA KW - Patentgesetz KW - Festschrift KW - Patentwesen ER -