Title:
High-frequency-wave signaling and communicating system
United States Patent 1572756
Inventors:
Smythe, Edwin H.
Williams Jr., Samuel B.
Publication Date:
02/09/1926
Export Citation:
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Assignee:
WESTERN ELECTRIC CO
Primary Class:
370/430
Other Classes:
370/496
International Classes:
H04M7/08; H04M7/08
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