US PATENT SUBCLASS 73 / 625
.~.~.~.~.~ Having plural sonic type transmitter or receiver transducers

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}
618  DF  .~.~.~ Measuring or testing system having scanning means {2}
620  DF  .~.~.~.~ By reflected wave {4}
625.~.~.~.~.~ Having plural sonic type transmitter or receiver transducers {1}
626  DF  .~.~.~.~.~.~> Switched

DEFINITION

Classification: 73/625

Having plural sonic type transmitter or receiver transducers:

(under subclass 620) Subject matter wherein more than one transmitter or receiver transducer is provided and wherein an additional transducer may serve function other than providing echoes from a discontinuity, such as a wave coupling test signal.