US PATENT SUBCLASS 84 / 723
.~.~ Transducers

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
723.~.~ Transducers {9}
724  DF  .~.~.~> Photoelectric
725  DF  .~.~.~> Electromagnetic {2}
730  DF  .~.~.~> Piezoelectric {2}
733  DF  .~.~.~> Capacitive
734  DF  .~.~.~> Strain gauge
735  DF  .~.~.~> Tone synthesis or timbre control {1}
737  DF  .~.~.~> Expression or special effects {4}
742  DF  .~.~.~> Selecting circuits
743  DF  .~.~.~> Constructional details {3}

DEFINITION

Classification: 84/723

Transducers:

(under subclass 600) Subject matter including means which converts energy other than electrical into electrical energy.

SEE OR SEARCH CLASS

29, Metal Working,

594, for methods of making an acoustic transducer.

178, Telegraph,

47, and 48 for electrical signaling systems in which vibrating means such as reeds, tuning forks and diaphragms are utilized in transmitting or receiving messages or signals.

310, Electrical Generator or Motor Structure, appropriate subclasses for general application of converting mechanical motion to electrical currents or potentials.

322, Electricity: Single Generator Systems, appropriate subclasses for general application of converting mechanical motion to electrical currents or potential, particularly 3, for reciprocating or oscillating generator systems.

704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,

200, 504 for speech signal processing, or bandwidth, or time compression, or expansion of an audio signal.