US PATENT SUBCLASS 340 / 542-- .~.~.~ Lock

US PATENT SUBCLASS 340 / 542
.~.~.~ Lock

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

500	DF	CONDITION RESPONSIVE INDICATING SYSTEM {6}
540	DF	.~ Specific condition {18}
541	DF	.~.~ Intrusion detection {8}
542		.~.~.~ Lock {1}
543	DF	.~.~.~.~> Permutation

DEFINITION

Classification: 340/542

Lock:

(under subclass 541) Subject matter wherein unauthorized or improper operation of a latching device operated by a key,

dial, etc., is detected.

SEE OR SEARCH CLASS

70, Locks,

432+, for locks with condition indicators; subclasses 262+ for systems, and subclasses 266+ for operating mechanism.

92, Expansible Chamber Devices,

5, for locks with a signal or indicator.

200, Electricity: Circuit Markers and Breakers, 61.64+, for lock, bolt, or keeper actuated switches.