US PATENT SUBCLASS 968 / 369
.~ Made of glass [G04B 39/00B]


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}
369.~ Made of glass [G04B 39/00B]