This folder contains material pertaining to public use proceedings and subsequent litigation brought by the National Phonograph Co. in the U.S. Patent Office, Supreme Court of the District of Columbia, and Court of Appeals of the District of Columbia. The proceedings were initiated in May 1899 and involved Edison's attempt to block applications by Leon F. Douglass and Thomas H. Macdonald for patents on a larger-diameter record with a high surface speed. The selected items consist of the following portions of the printed record on appeal: index, petition for mandamus, petition for public use proceedings, and affidavits of Edison and William E. Gilmore.
[QP040] Litigation Record, 1899-1902 1899-1902