US PATENT SUBCLASS 70 / 278.2
.~.~.~.~ Including use of a key

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
275  DF  .~ Using a powered device (e.g., motor) {2}
277  DF  .~.~ Electrical type (e.g., solenoid) {8}
278.1  DF  .~.~.~ Actuated after correct combination recognized (e.g., numerical, alphabetical, or magnet(s) pattern) {2}
278.2.~.~.~.~ Including use of a key {1}
278.3  DF  .~.~.~.~.~> Key rotated (e.g., Eurocylinder)

DEFINITION

Classification: 70/278.2

Including use of a key:

(under subclass 278.1) Subject matter in which the specially contrived implement is also necessary to operate the mechanism.