US PATENT SUBCLASS 968 / 912
.~.~.~ The time counters first being reset to zero [G04G 5/02B2]


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968 /   HD   HOROLOGY

906  DD  SETTING, I.E., CORRECTING OR CHANGING THE TIME-INDICATION (synchronization combined with automatic setting at regular intervals, e.g., by coded signals, etc., subclass 920) [G04G 5/00] {5}
910  DD  .~ By temporarily changing the number of pulses per unit time, e.g., quick-feed method, etc. [G04G 5/02] {2}
911  DD  .~.~ Quick-feed method [G04G 5/02B] {1}
912.~.~.~ The time counters first being reset to zero [G04G 5/02B2]