[NM020AAE], Technical Note, Thomas Alva Edison, April 27th, 1885

Item

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Abstract

way duplex or quadruplex? See U.S. Pats. 333,289, 333290, and 333,291; all seem to be from 4/27 - note to Dyer about what is important re strength of signal thru telephone - may be worth selecting by itself or as part of whole

Date

1885-04-27

Decade

1880-1889

Identifier

NM020AAE

Folder Set

NM020

Title

[NM020AAE], Technical Note, Thomas Alva Edison, April 27th, 1885

Microfilm ID

44:670

Publisher

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

Timestamp

April 27, 1885