Title:
Sound recording method and system
Document Type and Number:
United States Patent 2279018
Inventors:
Wolfe, Wallace V.
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Publication Date:
04/07/1942
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Assignee:
RCA CORP
Primary Class:
Other Classes:
369/85, 381/63, 369/3, 29/DIG.028, 369/4, 360/13, 84/DIG.026
International Classes:
G11B5/02