Gain control apparatus - AMERICAN TELEPHONE & TELEGRAPH

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

Export Citation:

Assignee:

AMERICAN TELEPHONE & TELEGRAPH

Primary Class:

333/16

Other Classes:

330/52, 330/145, 333/18

International Classes:

H04B3/10

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