04/08/1892 Foster and Freeman to Hudson, John Elbridge
(Swan, William W; Edison, Thomas Alva) Patent infringement [Cover Document and Attachment]
[X012F2]  AT&T Archives and History Center, Warren, N.J.: Thomas A. Edison Files -- Experiments and Inventions (Box 1221)
[X012F2M; TAEM 0:0]
Courtesy of the AT&T Archives and History Center.