US PATENT SUBCLASS 335 / 281
.~.~ Core or pole shape, structure or material

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

209  DF  MAGNETS AND ELECTROMAGNETS {10}
220  DF  .~ With magneto-mechanical motive device (e.g., electromagnet with armature) {21}
281.~.~ Core or pole shape, structure or material

DEFINITION

Classification: 335/281

(under subclass 220) Subject matter including significant magnetic core or pole shape, structure or material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84+, for magnetic structure in polarity responsive switches.

91, for actuating magnet structure or material in periodic

switches.

153, for permanent magnet structure in vacuum or hermetically sealed switches.

296+, for magnet structure or material. 297+, for core structure.

SEE OR SEARCH CLASS

336, Inductor Devices, appropriate subclasses, especially

83, for structure of core forms or casing for various inductor devices; subclass 212 for structure and assembly of plural cores for inductor devices, and subclasses 233+ for core structure and composition in general.