[NP021B], Technical Note, Thomas Alva Edison, March 4th, 1886

https://edisondigital.rutgers.edu/document/NP021B

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Title

[NP021B], Technical Note, Thomas Alva Edison, March 4th, 1886

Editor's Notes

"Deaf" notes and drawings related to hearing aid devices

Date

1886-03-04

Decade

1880-1889

Folder/Volume ID

NP021-F

Microfilm ID

44:157

Document ID

NP021B

Publisher

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