US PATENT SUBCLASS 335 / 302
.~.~ Permanent magnets

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

209  DF  MAGNETS AND ELECTROMAGNETS {10}
296  DF  .~ Magnet structure or material {4}
302.~.~ Permanent magnets {4}
303  DF  .~.~.~> Enclosed in flexible plastic, cloth or tape
304  DF  .~.~.~> With flux leakage-reducing means
305  DF  .~.~.~> Magnetic plug type (e.g., crankcase plug)
306  DF  .~.~.~> Plural magnets

DEFINITION

Classification: 335/302

(under subclass 296) Subject matter wherein the particular magnet structure relates to permanent magnets.

SEE OR SEARCH THIS CLASS, SUBCLASS:

153, for vacuum or hermetically sealed type switch with permanent magnet structure.

179, for switch with electromagnet and permanent magnet structure.

222, for relatively movable coil and permanent magnet structure.

229+, for magneto-mechanical motive device with permanent magnets.

283, for blade sharpening or conditioning type permanent magnets. 295, for work or object holding permanent magnet with magnet hold control means.

SEE OR SEARCH CLASS

29, Metal Working,

607+, for processes of mechanical manufacture of permanent magnets.

33, Geometrical Instruments,

355+, for magnetic compasses.

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, appropriate subclasses for ferrous alloys useful in permanent magnets.

251, Valves and Valve Actuation,

65, for permanent magnet valve actuator devices.

310, Electrical Generator or Motor Structures, especially

152+, for the structure of permanent magnets utilized in dynamoelectric machines and subclass 181 for field winding comprising electromagnet and permanent magnet structure. 324, Electricity: Measuring and Testing,

48, for testing permanent magnets.

336, Inductor Devices,

110, for inductor including permanent magnet structure.