Automatic frequency control
United States Patent 2404568

Inventors:
Dow, Orville E.
Publication Date:
07/23/1946
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Assignee:
RCA CORP
Primary Class:
331/9
Other Classes:
333/17.100, 333/235, 331/13, 318/606, 331/35, 331/6
International Classes:
H03L7/04; H03L7/02