US PATENT SUBCLASS 70 / 340
.~.~.~ Master- and change-key

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
336  DF  .~ Key {10}
337  DF  .~.~ Multiple keys {3}
340.~.~.~ Master- and change-key {2}
341  DF  .~.~.~.~> Change-key shutout
342  DF  .~.~.~.~> Submaster- and change-key {1}

DEFINITION

Classification: 70/340

(under subclass 337) Devices one of which keys is capable of releasing any other of a series of similar operating mechanisms effected by individual keys specifically fitted to each individual operating mechanism.