US PATENT SUBCLASS 307 / 141.8
.~.~.~ Series connected switches

Current as of: June, 1999
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307 /   HD   ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS

112  DF  SWITCHING SYSTEMS {5}
139  DF  .~ Switch actuation {5}
141  DF  .~.~ With time delay or retardation means {2}
141.8.~.~.~ Series connected switches

DEFINITION

Classification: 307/141.8

(under subclass 141) Subject matter wherein the time delay is achieved by means of serially connected switches operated by a timer.