[D8468ZBM], Patent Application, Sigmund Bergmann, September 15th, 1884

Item

Abstract

[typescript] Patent application for Improvement in Electric Telephone Transmitters.

Date

1884-09-15

Decade

1880-1889

Identifier

D8468ZBM

Folder Set

D8468

Title

[D8468ZBM], Patent Application, Sigmund Bergmann, September 15th, 1884

Microfilm ID

76:787

Publisher

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

Item sets