US PATENT SUBCLASS 968 / 922
.~ By radio [G04G 7/02]


Current as of: June, 1999
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968 /   HD   HOROLOGY

920  DD  SYNCHRONIZATION [G04G 7/00] {2}
922.~ By radio [G04G 7/02] {2}
923  DD  .~.~> Provided with arrangements to prevent synchronization by interfering signals [G04G 7/02B]
924  DD  .~.~> The timepiece preparing itself on set times on the reception of the synchronizing signal [G04G 7/02C]