US PATENT SUBCLASS 368 / 175
.~.~.~ By hairspring

Current as of: June, 1999
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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

168  DF  OSCILLATING OR RECIPROCATING MEANS {2}
169  DF  .~ Balance wheel type {1}
170  DF  .~.~ With regulation {4}
175.~.~.~ By hairspring {3}
176  DF  .~.~.~.~> With curb pins
177  DF  .~.~.~.~> With collet
178  DF  .~.~.~.~> With stud

DEFINITION

Classification: 368/175

By hairspring:

(under subclass 170) Subject matter comprising a coiled spring which is used to control the balance wheel movement.