Title:
Gain control apparatus
United States Patent 1927128


Inventors:
Lindsay, Russell H.
Application Number:
US57860331A
Publication Date:
09/19/1933
Filing Date:
12/02/1931
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
Primary Class:
Other Classes:
330/52, 330/145, 333/18
International Classes:
H04B3/10
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