[PT032AAW], Patent Application, Thomas Alva Edison, March 3rd, 1888
https://edisondigital.rutgers.edu/document/PT032AAW
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Title
[PT032AAW], Patent Application, Thomas Alva Edison, March 3rd, 1888
Editor's Notes
Objective is to make a process to duplicate phonographic record by creating a negative of the recording, which can be impressed on blanks. The process of knurling will be added to the process of the duplication of phonograms. [4 figs; 2 claims]
Author
Date
1888-03-03
Type
Folder/Volume ID
PT032AAW-F
Microfilm ID
114:306
Document ID
PT032AAW
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University