US PATENT SUBCLASS 70 / 368
.~.~.~.~.~.~ Key- and tool-controlled

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}
367  DF  .~.~.~.~.~ Cylinder and plug assembly {2}
368.~.~.~.~.~.~ Key- and tool-controlled

DEFINITION

Classification: 70/368

(under subclass 367) Devices in which release and consequent removal of the plug from the cylinder is effected by both a key and a tool.