09/25/1891 Hammer, Edwin Wesley to Kennelly, Arthur Edwin
(Jenks, William J; Langford, Arthur W) Patent infringement; Incandescent lamp; Sockets, fuses, meters, and other interior elements [Marginalia by Langford, Arthur W]
[D9142]  Document File Series -- 1891: (D-91-42) Patents
[D9142ADR; TAEM 131:759]
Courtesy of Thomas Edison National Historical Park.