US PATENT SUBCLASS 70 / 423
.~.~.~ Keyhole guards

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
336  DF  .~ Key {10}
416  DF  .~.~ Tampering prevention or attack defeating {6}
423.~.~.~ Keyhole guards {3}
424  DF  .~.~.~.~> Portable
425  DF  .~.~.~.~> Combination-controlled {1}
427  DF  .~.~.~.~> Key-controlled {1}

DEFINITION

Classification: 70/423

(under subclass 416) Devices which prevent or hinder free access to the usual key-hole, usually a portion of the lock operating mechanism or associated therewith in the same housing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371, for similarly usable devices.

440, for seals covering key-holes.