US PATENT SUBCLASS 968 / 768
.~ For hairsprings of balances [G04D 7/10]
Current as of:
June, 1999
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968 /
HD
HOROLOGY
748
DD
MEASURING, COUNTING, CALIBRATING, TESTING, OR REGULATING APPARATUS (measuring devices and calibers in general G01B; counters in general H03K) [G04D 7/00]
{11}
768
.~ For hairsprings of balances [G04D 7/10]
