[D7941ZEX], Letter from Thomas Alva Edison to Edward Hibberd Johnson, October 1st, 1879

Item

You can re-use this digital object via this IIIF manifest

Abstract

Notes on Brewer & Jensen report to Valance & Valance; it misinterprets teleph pat. Impts of controlling induction. Phono is "legit part" of telephephone system of reproducing sound at distance. Willing to disclaim phono if it jeopardizes teleph patent. Quotes report comparing phono to emg. Carbon button finely divided. Can throw out claims 22 & 24. Misinterpret claim 18 (emg).

Date

1879-10-01

Decade

1870-1879

Type

Identifier

D7941ZEX

Folder Set

D7941

Title

[D7941ZEX], Letter from Thomas Alva Edison to Edward Hibberd Johnson, October 1st, 1879

Microfilm ID

52:758

Publisher

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