US PATENT SUBCLASS 70 / 358
.~.~.~.~.~ Plural tumbler sets

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
336  DF  .~ Key {10}
344  DF  .~.~ Single key {4}
348  DF  .~.~.~ Tumbler type {5}
357  DF  .~.~.~.~ Cylinder type {9}
358.~.~.~.~.~ Plural tumbler sets

DEFINITION

Classification: 70/358

(under subclass 357) Subject matter wherein the cylinder is provided with a plurality of tumbler sets which must be concurrently set to effect release of the movable portion of the cylinder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337+, for cylinder lock mechanism requiring more than one key for operation.