Wave signaling system
United States Patent 1561278

Inventors:
Pupin, Michael I.
Publication Date:
11/10/1925
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Assignee:
WESTINGHOUSE ELECTRIC & MFG CO
Primary Class:
381/98
Other Classes:
367/149, 367/157, 310/334, 330/53, 381/94.700, 333/24R, 310/319, 381/92
International Classes:
H04R17/02