US PATENT SUBCLASS 340 / 446
.~.~.~.~ Acoustic wave

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

425.5  DF  LAND VEHICLE ALARMS OR INDICATORS {11}
438  DF  .~ Internal alarm or indicator responsive to a condition of the vehicle {13}
442  DF  .~.~ Tire deflation or inflation {2}
445  DF  .~.~.~ With particular telemetric coupling {3}
446.~.~.~.~ Acoustic wave

DEFINITION

Classification: 340/446

Acoustic wave:

(under subclass 445) Subject matter in which the signal is carried by sound waves generated by a device mounted on the rotating wheel.

SEE OR SEARCH CLASS

367, Communications, Electrical: Acoustic Wave Systems and Devices,

13, 117, and 137+ for generic acoustic wave transmission systems.