US PATENT SUBCLASS 968 / 111
.~.~.~ Manufacture of the spiral spring (locking of the spiral spring by the regulating lever subclass 121; spiral spring with temperature compensation subclass 129; fixation of the spiral spring on the collet subclass 135; mainspring subclass 10) [G04B 17/06C]


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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}
107  DD  .~ Oscillators acting by spring tension [G04B 17/04] {4}
109  DD  .~.~ Oscillators with hairsprings, e.g., balance, etc. (electrically driven balances subclass 466; contacts actuated by a balance subclass 546) [G04B 17/06] {2}
111.~.~.~ Manufacture of the spiral spring (locking of the spiral spring by the regulating lever subclass 121; spiral spring with temperature compensation subclass 129; fixation of the spiral spring on the collet subclass 135; mainspring subclass 10) [G04B 17/06C]