US PATENT SUBCLASS 137 / 384.4
.~.~ Combination lock

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

383  DF  WITH LOCK OR SEAL {3}
384.2  DF  .~ Common lock and valve actuator {3}
384.4.~.~ Combination lock

DEFINITION

Classification: 137/384.4

(under subclass 384.2) Devices in which the lock comprises an element which is, or a plurality of elements which are, manually manipulable in a predetermined sequence, or to a predetermined position to effect the operation of the lock.