[D8468ZBM], Patent Application, Sigmund Bergmann, September 15th, 1884
https://edisondigital.rutgers.edu/document/D8468ZBM
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Title
[D8468ZBM], Patent Application, Sigmund Bergmann, September 15th, 1884
Editor's Notes
[typescript] Patent application for Improvement in Electric Telephone Transmitters.
Author
Date
1884-09-15
Decade
1880-1889
Type
Subject
Folder/Volume ID
D8468-F
Microfilm ID
76:787
Document ID
D8468ZBM
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University