[MBP034], Patent Issued, Thomas Alva Edison, December 8th, 1880

Item

Abstract

British Patent 5113 (1880). Telephone improvements: improvements in carbon transmitter diaphragm---means of pressing on carbon.

Date

1880-12-08

Decade

1880-1889

Subject

Identifier

MBP034

Folder Set

MBP

Title

[MBP034], Patent Issued, Thomas Alva Edison, December 8th, 1880

Microfilm ID

92:236

Publisher

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