US PATENT SUBCLASS 367 / 105
.~.~.~ Transducer switching or gating

Current as of: June, 1999
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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

87  DF  ECHO SYSTEMS {6}
99  DF  .~ Distance or direction finding {5}
103  DF  .~.~ With beam steering, scanning, or focussing {2}
105.~.~.~ Transducer switching or gating

DEFINITION

Classification: 367/105

Transducer switching or gating:

(under subclass 103) Subject matter in which the directional characteristics are varied by selectively or repetitively opening or closing the electric signal path to the transducer.