US PATENT SUBCLASS 307 / 141
.~.~ With time delay or retardation means

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.~.~ With time delay or retardation means {2}
141.4  DF  .~.~.~> Electrically initiated
141.8  DF  .~.~.~> Series connected switches

DEFINITION

Classification: 307/141

(under subclass 139) Subject matter having time delay or retarding means.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

195+, for miscellaneous relay systems having time delay means.