US PATENT SUBCLASS 968 / 701
.~.~.~ For coil-springs (coil-springs in general B12F; springs for the driving mechanism subclass 710) [G04D 3/00B12C]


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968 /   HD   HOROLOGY

685  DD  WATCHMAKER'S OR WATCH-REPAIRER'S MACHINES OR TOOLS FOR WORKING MATERIALS (metal working in general Class B23) [G04D 3/00] {7}
686  DD  .~ For mechanical working other than with a lathe (lathes for watchmakers subclass 724) [G04D 3/00B] {10}
699  DD  .~.~ For components of the regulating mechanism [G04D 3/00B12] {2}
701.~.~.~ For coil-springs (coil-springs in general B12F; springs for the driving mechanism subclass 710) [G04D 3/00B12C]