US PATENT SUBCLASS 70 / 419
.~.~.~ Anti-pick

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}
419.~.~.~ Anti-pick {2}
420  DF  .~.~.~.~> Guard ward
421  DF  .~.~.~.~> Guard tumbler

DEFINITION

Classification: 70/419

(under subclass 416) Devices which render difficult the normal operation of the impeding elements or the passage of fixed impediments by means or implements other than the usual key, by entry through the usual key passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

333, for devices designed to prevent forcible operation by external force.