01/14/1879 Bliss, George Harrison to Edison, Thomas Alva
(Story, Gustave; Herz, Cornelius) Patent infringement; Multiple telegraphy (duplex, quadruplex); Electric pen and mimeograph [Cover Document and Attachment]
[D7923]  Document File Series -- 1879: (D-79-23) Electric Pen
[D7923N; TAEM 50:386]
Courtesy of Thomas Edison National Historical Park.