US PATENT SUBCLASS 70 / 439
.~.~ Tampering detector

Current as of: June, 1999
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70 /   HD   LOCKS

431  DF  PARTS, ATTACHMENTS, ACCESSORIES AND ADJUNCTS {9}
432  DF  .~ Condition indicators {5}
439.~.~ Tampering detector {1}
440  DF  .~.~.~> With seal

DEFINITION

Classification: 70/439

(under subclass 432) Devices which transmit to the operator information other than visible information that the operating mechanism has been previously tampered with.

SEE OR SEARCH CLASS

340, Communications: Electrical,

542+, for electrical automatic lock condition responsive indicating systems.