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

Item

Abstract

"Deaf" notes and drawings related to hearing aid devices

Date

1886-03-04

Decade

1880-1889

Identifier

NP021B

Folder Set

NP021

Title

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

Microfilm ID

44:157

Publisher

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

Item sets