Radio-amplifying circuits
United States Patent 1940228

Inventors:
Polydoroff, Wladimir J.
Publication Date:
12/19/1933
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Assignee:
JOHNSON LAB INC
Primary Class:
330/169
Other Classes:
336/226, 336/206, 330/171, 336/136, 334/77, 334/61, 330/155, 361/298.100, 336/234
International Classes:
H01F21/06; H01F21/02