US PATENT SUBCLASS 340 / 531
.~ With particular coupling link

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
531.~ With particular coupling link {3}
532  DF  .~.~> Having particular safety function
533  DF  .~.~> Wired {4}
539  DF  .~.~> Radio

DEFINITION

Classification: 340/531

With particular coupling link:

(under subclass 500) Subject matter having specific connecting means between the sensing and indicating means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

870.28+, for continuously variable indication via a radiant energy beam.