Title:
Sonic transducer
United States Patent 3331970

Inventors:
Martin, Dundon Thomas
Frappier, Joseph M. R.
Publication Date:
07/18/1967
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Assignee:
HONEYWELL INC
Primary Class:
310/324
Other Classes:
367/160, 310/335
International Classes:
B06B1/06; H04R17/00
US Patent References:
3187300Pressure-compensated transducer