US PATENT SUBCLASS 968 / 371
.~.~ Out of wear resistant material, e.g., sapphire, etc. [G04B 39/00C2]
Current as of:
June, 1999
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968 /
HD
HOROLOGY
368
DD
WATCH CRYSTALS; FASTENING OR SEALING OF CRYSTALS; CLOCK GLASSES [G04B 39/00]
{4}
370
DD
.~ From a material other than glass [G04B 39/00C] {1}
371
.~.~ Out of wear resistant material, e.g., sapphire, etc. [G04B 39/00C2]
