[NM020AAE], Technical Note, Thomas Alva Edison, April 27th, 1885
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Title
[NM020AAE], Technical Note, Thomas Alva Edison, April 27th, 1885
Editor's Notes
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
Author
Mentioned
Date
1885-04-27
Type
Folder/Volume ID
NM020-F
Microfilm ID
44:670
Document ID
NM020AAE
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University