Electric to sonic transducer
United States Patent 3213208
US Patent References:
/0271188.html
- - 0271188

/0396121.html
- - 0396121

Magnetic structure
- - 2222425

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- - 2391313

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Inventors:
Power, Roy B.
Publication Date:
10/19/1965
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Assignee:
TUNG SOL ELECTRIC INC
Primary Class:
381/164
Other Classes:
310/306
International Classes:
H04R23/00
US Patent References:
2637823Thermomagnetic transducer