US PATENT SUBCLASS 968 / 496
ELECTRIC OR MAGNETIC MEANS FOR CONVERTING OSCILLATORY TO ROTARY MOTION IN TIMEPIECES, I.E., ELECTRIC OR MAGNETIC ESCAPEMENTS (regulators subclass 446) [G04C 5/00]

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968 /   HD   HOROLOGY

496ELECTRIC OR MAGNETIC MEANS FOR CONVERTING OSCILLATORY TO ROTARY MOTION IN TIMEPIECES, I.E., ELECTRIC OR MAGNETIC ESCAPEMENTS (regulators subclass 446) [G04C 5/00] {1}
497  DD  .~> Magnetic or electromagnetic means [G04C 5/00B]