US PATENT SUBCLASS 84 / 725
.~.~.~ Electromagnetic

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
600  DF  .~ Electrical musical tone generation {5}
723  DF  .~.~ Transducers {9}
725.~.~.~ Electromagnetic {2}
726  DF  .~.~.~.~> String {2}
729  DF  .~.~.~.~> Reed

DEFINITION

Classification: 84/725

Electromagnetic:

(under subclass 723) Subject matter including means which converts varying magnetic flux into varying electric currents or potentials.

SEE OR SEARCH THIS CLASS, SUBCLASS:

641, for magnetic with digital storage.

SEE OR SEARCH CLASS

29, Metal Working,

602.1+, for methods of manufacturing an electromagnet, transformer or indicator.

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).

381, Electrical Audio Signal Processing Systems and Devices, 115, for magnetic microphone.