Title:
Carrier-receiving system
United States Patent 1677224


Inventors:
Affel, Herman A.
Application Number:
US9688726A
Publication Date:
07/17/1928
Filing Date:
03/23/1926
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
Primary Class:
Other Classes:
333/16, 455/46
International Classes:
H04B7/005
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