US PATENT SUBCLASS 340 / *
CONDITION RESPONSIVE INDICATING SYSTEM (340/500)

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

*CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {2}
FOR 106  DF  .~> Specified power supply or housing (340/693)
FOR 107  DD  .~> Loop (340/825.05)