Title:
Phonographic recording and reproducing system
United States Patent 1454157


Inventors:
Egerton, Henry C.
Application Number:
US24575718A
Publication Date:
05/08/1923
Filing Date:
07/19/1918
Assignee:
WESTERN ELECTRIC CO
Primary Class:
Other Classes:
369/47.38, 379/83
International Classes:
H04M1/65
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