US PATENT SUBCLASS 323 / 323
.~.~ With interval timer

Current as of: June, 1999
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323 /   HD   ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS

318  DF  EXTERNAL OR OPERATOR CONTROLLED {5}
320  DF  .~ Phase controlled switching using electronic tube or a three or more terminal semiconductive device {6}
323.~.~ With interval timer

DEFINITION

Classification: 323/323

With interval timer:

(under subclass 320) Subject matter which includes means for predetermining the length of time of operation of the system or a part thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

319, for zero switching devices which may include interval timers.