Title:
Two-way radio telephone system
United States Patent 1678672


Inventors:
Lloyd, Espenschied
Anderson, Clifford N.
Application Number:
US70772024A
Publication Date:
07/31/1928
Filing Date:
04/19/1924
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
Primary Class:
Other Classes:
246/8, 455/563
International Classes:
H04B1/46
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