US PATENT SUBCLASS 367 / 137
TRANSMITTER SYSTEMS

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

137TRANSMITTER SYSTEMS {2}
138  DF  .~> With beam forming, shaping, steering, or scanning
139  DF  .~> Animal control

DEFINITION

Classification: 367/137

TRANSMITTER SYSTEMS:

(under the class definition) Subject matter comprising electrical wave generating circuitry coupled to an acoustic wave transducer-emitter.

SEE OR SEARCH CLASS

341, Coded Data Generation or Conversion,

22+, for a keyboard controlled vibrating element for producing an encoded electrical signal.