US PATENT SUBCLASS 335 / 229
.~.~ With permanent magnet

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}
229.~.~ With permanent magnet {1}
230  DF  .~.~.~> Polarized electromagnet {4}

DEFINITION

Classification: 335/229

(under subclass 220) Subject matter wherein the magnetomechanical motive device includes a permanent magnet in combination with the electromagnet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

137, for multiple contact electromagnetically actuated switches including a permanent magnet.

153, for vacuum or hermetically sealed switches with permanent magnet.

179, for electromagnetically actuated switches with plural magnets of diverse magnetic characteristics, including permanent magnet.

205+, for permanent magnet actuated switches.

222, for relatively movable coil and permanent magnet such as D'Arsonval type devices. 302+, for permanent magnet structure.

SEE OR SEARCH CLASS

336, Inductor Devices, especially

110, for inductor device with permanent magnet.