US PATENT SUBCLASS 70 / 390
.~.~ False or picking key trapping

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
336  DF  .~ Key {10}
390.~.~ False or picking key trapping

DEFINITION

Classification: 70/390

(under subclass 336) Devices including mechanism to positively retain or trap a false or picking key or implement which may be inserted in the usual guide way or passage provided for the key.

SEE OR SEARCH THIS CLASS, SUBCLASS:

439, for devices which do not positively retain or trap the key but which will immediately indicate to the user of the proper key, tampering with the lock.