US PATENT SUBCLASS 340 / *
.~.~ Intrusion detection (340/541)

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

*  DD  CONDITION RESPONSIVE INDICATING SYSTEM (340/500) {1}
*  DD  .~ Specific condition (340/540) {1}
*.~.~ Intrusion detection (340/541) {1}
FOR 100  DF  .~.~.~> Door or window movement (340/545)