US PATENT SUBCLASS 219 / 641
.~.~ Valve

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

600  DF  INDUCTIVE HEATING {7}
635  DF  .~ Specific heating application {8}
641.~.~ Valve

DEFINITION

Classification: 219/641

Valve:

(under subclass 635) Subject matter wherein the heating is applied to a circular band having a flap or lid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

606, for bonding a valve seat to a conductor.

SEE OR SEARCH CLASS

29, Metal Working,

890.12+, for valve making.