US PATENT SUBCLASS 70 / 416
.~.~ Tampering prevention or attack defeating

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
336  DF  .~ Key {10}
416.~.~ Tampering prevention or attack defeating {6}
417  DF  .~.~.~> Armoring
418  DF  .~.~.~> Anti-jimmy
419  DF  .~.~.~> Anti-pick {2}
422  DF  .~.~.~> Yielding or frangible connections
423  DF  .~.~.~> Keyhole guards {3}
429  DF  .~.~.~> Key securers, fasteners or retainers {1}

DEFINITION

Classification: 70/416

(under subclass 336) Devices including mechanisms to prevent tampering with the operating mechanism of a key lock or any static means designed to prevent an attack by an unauthorized force or by destructive heat.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.5+, for devices which upon attack by an unauthorized force impose an additional impediment to the operation of a lock.

333+, for similar devices associated with combination locks.

417, for static armor construction for key locks which prevent transmission of unauthorized force upon the exterior of the lock to disable the lock.