US PATENT SUBCLASS 70 / 427
.~.~.~.~ Key-controlled

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  DF  .~.~.~ Keyhole guards {3}
427.~.~.~.~ Key-controlled {1}
428  DF  .~.~.~.~.~> Portable

DEFINITION

Classification: 70/427

(under subclass 423) Devices which are secured or their operation effected by means of a key control mechanism.