US PATENT SUBCLASS 73 / 643
.~.~.~.~ Nonvibrating transducer

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

570  DF  VIBRATION {10}
584  DF  .~ By mechanical waves {13}
596  DF  .~.~ Beamed {10}
632  DF  .~.~.~ Sonic wave transmitter or receiver transducer {4}
643.~.~.~.~ Nonvibrating transducer

DEFINITION

Classification: 73/643

Nonvibrating transducer:

(under subclass 632) Subject matter wherein the transducer means does not mechanically vibrate but induces or receives mechanical vibrations, as by arc discharge, laser beam, electromagnetic means, etc.