US PATENT SUBCLASS 381 / 1
BINAURAL AND STEREOPHONIC

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

1BINAURAL AND STEREOPHONIC {8}
2  DF  .~> Broadcast or multiplex stereo {2}
17  DF  .~> Pseudo stereophonic {1}
19  DF  .~> Quadrasonic {1}
23.1  DF  .~> Hearing aid
300  DF  .~> Stereo speaker arrangement {7}
26  DF  .~> Stereo sound pickup device (microphone)
27  DF  .~> Center channel
28  DF  .~> Amplifier

DEFINITION

Classification: 381/1

BINAURAL AND STEREOPHONIC:

(under the class definition) Subject matter where there are two or more independent sound signals which are to be separately reproduced so as to create a sense of depth.

(1) Note. "Sound signals" are electric signals representing sounds.

(2) Note. Stereophonic or pseudo stereo- phonic systems are

classified here, not in Class 370.

SEE OR SEARCH CLASS

360, Dynamic Magnetic Information Storage or Retrieval, for magnetically recording or reproducing stored stereophonic information.

369, Dynamic Information Storage or Retrieval,

85+, for recording or reproducing stored stereophonic information. 370, Multiplex Communications, appropriate subclasses for multiplex in general.