US PATENT SUBCLASS 219 / 551
.~.~.~.~ Gasket or wafer-type insulator means

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
538  DF  .~ With heating unit structure {6}
546  DF  .~.~ Core, sheath, or support means for heating element {2}
548  DF  .~.~.~ Of particular construction or material {3}
551.~.~.~.~ Gasket or wafer-type insulator means

DEFINITION

Classification: 219/551

(under subclass 548) Subject matter wherein the significant core, sheath or support means is recited as comprising a thin plate or wafer element of insulating material and including means whereby the element may be rigidly inserted between two external members; usually metallic, in the manner of a conventional gasket.

SEE OR SEARCH CLASS

174, Electricity: Conductors and Insulators,

137+, especially subclass 138 for special application and subclasses 151+ for through wall or plate insulators.