US PATENT SUBCLASS 968 / 524
DRIVING MECHANISMS FOR CLOCKS BY MASTER CLOCKS [G04C 13/00]

Current as of: June, 1999
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968 /   HD   HOROLOGY

524DRIVING MECHANISMS FOR CLOCKS BY MASTER CLOCKS [G04C 13/00] {2}
525  DD  .~> Circuit arrangements; electric clock installations [G04C 13/02] {5}
547  DD  .~> Slave clocks actuated intermittently [G04C 13/08] {3}