US PATENT SUBCLASS 434 / 316
.~.~ With code on audio carrier for controlling operation of apparatus

Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

308  DF  AUDIO RECORDING AND VISUAL MEANS {4}
314  DF  .~ Image projector {2}
316.~.~ With code on audio carrier for controlling operation of apparatus

DEFINITION

Classification: 434/316

With code on audio carrier for controlling operation of apparatus:

(under subclass 314) Subject matter wherein the sound information carrier carries a code (e.g.., a tone of selected frequency, etc.) to control the operation of the device.