US PATENT SUBCLASS 968 / 770
.~.~ Only for measuring [G04D 7/12B]


Current as of: June, 1999
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968 /   HD   HOROLOGY

748  DD  MEASURING, COUNTING, CALIBRATING, TESTING, OR REGULATING APPARATUS (measuring devices and calibers in general G01B; counters in general H03K) [G04D 7/00] {11}
769  DD  .~ Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard (supporting devices for clocks with built-in recording apparatus subclass 681; measuring short time intervals subclass 844; frequency measuring in general H04B, G01R) [G04D 7/12] {2}
770.~.~ Only for measuring [G04D 7/12B] {2}
771  DD  .~.~.~> For complete clockworks [G04D 7/12B2] {1}
774  DD  .~.~.~> For the control mechanism only found from outside the clockwork [G04D 7/12B3] {2}