Electrical-acoustic transducer
United States Patent 2937244
US Patent References:
/0476007.html
- - 0476007

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- - 2410806

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- - 2429104

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- - 2538419


Inventors:
Ralph, Weinger
Publication Date:
05/17/1960
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Assignee:
JETRONIC IND INC
Primary Class:
381/367
Other Classes:
381/385, 367/132, 381/344, 367/173
International Classes:
H04R1/44