US PATENT SUBCLASS 968 / 132
.~.~ For the effect of unbalance of the weights, e.g., tourbillon, etc. (construction of the balance subclass 110; setting the frequency by adjusting devices fixed on the balance subclass 116) [G04B 17/28]


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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}
125  DD  .~ Compensation of mechanisms for stabilizing frequency [G04B 17/20] {4}
132.~.~ For the effect of unbalance of the weights, e.g., tourbillon, etc. (construction of the balance subclass 110; setting the frequency by adjusting devices fixed on the balance subclass 116) [G04B 17/28] {1}
133  DD  .~.~.~> Tourbillons [G04B 17/28B]