US PATENT SUBCLASS 968 / 137
.~.~.~ Construction of the spiral roll [G04B 17/32B2]


Current as of: June, 1999
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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}
135  DD  .~ Component parts or constructional details, e.g., collet, stud, etc. [G04B 17/32] {2}
136  DD  .~.~ Devices for locking the spring on the axle of the balance [G04B 17/32B] {1}
137.~.~.~ Construction of the spiral roll [G04B 17/32B2]