US PATENT SUBCLASS 70 / 334
.~.~.~ Resonance type

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
286  DF  .~ Combination {8}
333 R  DF  .~.~ Tampering prevention or attach defeating {2}
334.~.~.~ Resonance type

DEFINITION

Classification: 70/334

(under subclass 333) Mechanisms producing audible sounds to confuse and to prevent possible determination of the combination by audible sounds emitting from the conventional structure in its normal operation.