US PATENT SUBCLASS 434 / 319
AUDIO RECORDING

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

319AUDIO RECORDING {2}
320  DF  .~> Listener's voiced response recorded
321  DF  .~> Operation of apparatus controlled by listener's response to question or problem

DEFINITION

Classification: 434/319

AUDIO RECORDING:

(under the class definition) Subject matter wherein instruction is reproduced from an audio carrier such as a magnetic tape or a phonograph record.

SEE OR SEARCH THIS CLASS, SUBCLASS:

156+, for an audio recording used in language instruction.

308+, for subject matter wherein instruction is presented from both an audio recording and a visual means.

SEE OR SEARCH CLASS

360, Dynamic Magnetic Information Storage or Retrieval, appropriate subclasses for audio reproduction from a magnetic recording.

369, Dynamic Information Storage or Retrieval,

84+, for audio reproducing devices in general.