TAE and Bergmann telephone improvements patent. Listing of the claims for this patent application. There are 7 claims written in this document.

Bergmann, Sigmund

Edison, Thomas Alva

1883-11-13

1880-1889

Patent Application

Patent application

Telephone

D8370ZDE

D8370

[D8370ZDE], Patent Application, Thomas Alva Edison, Sigmund Bergmann, November 13th, 1883

70:1048

Thomas Edison National Historical Park

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University

November 13, 1883