This folder contains material pertaining to three suits brought or considered by the National Phonograph Co. against the American Graphophone Co. and its sales company, the Columbia Phonograph Co., General. The first case was initiated during January 1903 in the U.S. Circuit Court for the Southern District of New York and involved Edison U.S. Patent 454,941 on a built-up diaphragm. The selected items consist of correspondence and memoranda pertaining to Edison's deposition in the case. The second suit was considered by Edison and his attorneys during August 1904 and involved charges of unfair competition. The selected items consist of correspondence and the proposed bill of complaint. The third case was initiated during October 1904 in the U.S. Circuit Court for the District of Connecticut and involved Edison's U.S. Patents 397,280 and 430,278 on a floating-weight reproducer. The selected items consist of the bill of complaint and Edison's affidavit.