Transmission system
United States Patent 1733609

Inventors:
Kuhn, John J.
Publication Date:
10/29/1929
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Assignee:
WESTERN ELECTRIC CO
Primary Class:
455/14
Other Classes:
455/277.100, 455/291, 343/728, 381/77, 333/124
International Classes:
H04H1/12; H04H1/02