US PATENT SUBCLASS 84 / 600
.~ Electrical musical tone generation

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600.~ Electrical musical tone generation {5}
601  DF  .~.~> Data storage {6}
646  DF  .~.~> Fret control
647  DF  .~.~> Digital combinational circuit {7}
671  DF  .~.~> Electric analog oscillators {9}
723  DF  .~.~> Transducers {9}

DEFINITION

Classification: 84/600

Electrical musical tone generation:

(under subclass 1) Subject matter including means for generating or modifying electric currents or potentials to produce varying electric currents or potentials in combination with, or intended for converting the varying electric currents or potentials into sound vibrations for the production of musical tones.

(1) Note. For devices which generate or modify an electric current or potential so as to produce a particular waveform, see the search notes below.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

106+, for waveform or waveshape determinative circuits.

310, Electrical Generator or Motor Structure, appropriate subclasses for electrical generators, particularly

111, for generated wave modifications; subclass 160 for rotary frequency converters, and subclasses 166+ for induction and variable reluctance type A. C. generators. 322, Electricity: Single Generator Systems, appropriate subclasses for miscellaneous generator systems for generating electric currents and potentials.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous nonlinear circuits using active devices such as tubes or transistors.

331, Oscillators, appropriate subclasses for electrical oscillator systems, per se.

333, Wave Transmission Lines and Networks,

20, for electric waveshaping networks of the passive type and subclass 167 for electric wave filters.

336, Inductor Devices, appropriate subclasses for inductive reactors and transformers which are provided with fixed or movable elements (e.g., having a moving armature to modify the impedance of an inductive reactor).

338, Electrical Resistors,

69, for mechanically variable resistors actuated by musical instrument playing keys.

363, Electric Power Conversion Systems, appropriate subclasses for electric power conversion systems;

particularly

13+, for rectifying and inverting systems, and subclasses 157+ for frequency conversion systems.

381, Electrical Audio Signal Processing Systems and Devices, 51+, for speech synthesis.