US PATENT SUBCLASS 70 / 410
.~.~.~.~.~ Frangible

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
336  DF  .~ Key {10}
391  DF  .~.~ Operating elements {2}
393  DF  .~.~.~ Keys {8}
409  DF  .~.~.~.~ Bitting {3}
410.~.~.~.~.~ Frangible

DEFINITION

Classification: 70/410

(under subclass 409) Devices having frangible parts whereby the resulting combination may be effected by simply breaking away the frangible parts.