US PATENT SUBCLASS 70 / 400
.~.~.~.~.~ Nested second key

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}
395  DF  .~.~.~.~ Multi-part structures {5}
400.~.~.~.~.~ Nested second key

DEFINITION

Classification: 70/400

(under subclass 395) Subject matter wherein one key is nested within the other, both of which constitute a single or unit operative implement.