US PATENT SUBCLASS 368 / 57
.~.~ By signal amplitude change

Current as of: June, 1999
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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

46  DF  PLURAL TIMEPIECE SYSTEM OR SYSTEM DEVICE (E.G., PRIMARY OR SECONDARY CLOCKS) {5}
52  DF  .~ Primary with direct synchronization or drive {6}
57.~.~ By signal amplitude change

DEFINITION

Classification: 368/57

By signal amplitude change:

(under subclass 52) Subject matter wherein the synchronizing is accomplished by a change in the amplitude of the driving signal.