US PATENT SUBCLASS 968 / 116
.~.~ By adjusting the devices fixed on the balance (construction of the pendulum subclass 110; balancing subclass 132) [G04B 17/12C]

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968 /   HD   HOROLOGY

103  DD  MECHANISMS FOR STABILIZING FREQUENCY (magnetic subclass 497; in striking mechanisms subclass 224; stopping and regulating of the running subclass 234; electrical and thermoelectric regulating mechanisms subclass 496) [G04B 17/00] {8}
114  DD  .~ Setting the frequency [G04B 17/12] {3}
116.~.~ By adjusting the devices fixed on the balance (construction of the pendulum subclass 110; balancing subclass 132) [G04B 17/12C]