Radio communication
United States Patent 2217911

Inventors:
Lindenblad, Nils E.
Publication Date:
10/15/1940
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Assignee:
RCA CORP
Primary Class:
343/800
Other Classes:
343/807, 343/816, 343/808
International Classes:
H01Q21/20; H01Q21/24; H01Q21/26