US PATENT SUBCLASS 84 / 687
.~.~.~.~ Force or velocity responsive

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
671  DF  .~.~ Electric analog oscillators {9}
678  DF  .~.~.~ Selecting circuits {9}
687.~.~.~.~ Force or velocity responsive {3}
688  DF  .~.~.~.~.~> With magnetic selector
689  DF  .~.~.~.~.~> With capacitive selector
690  DF  .~.~.~.~.~> With variable resistance selector

DEFINITION

Classification: 84/687

Force or velocity responsive:

(under subclass 678) Subject matter wherein the selecting circuit is responsive to the applied pressure, force or velocity.

SEE OR SEARCH THIS CLASS, SUBCLASS:

626, for force or velocity responsive with digital storage.

658, for force or velocity responsive with digital combinational circuit.

SEE OR SEARCH CLASS

73, Measuring and Testing,

488+, for speed or acceleration testing.

200, Electricity: Circuit Makers and Breakers, Dig. 32 for speed responsive switching. 324, Electricity: Measuring and Testing,

160, for speed or velocity measuring.

338, Electrical Resistors,

69, for variable resistance key activation devices.

356, Optics: Measuring and Testing,

28, for velocity measuring utilizing a light detector.

362, Illumination,

802, for a position or condition responsive switch.