Transparent and scratchproof watch crystal and watch case fitted

Details Transparent and scratchproof watch crystal and watch case fitted Transparent and scratchproof watch crystal and watch case fitted

1998-01-14

2000-08-29

Miska, Vit

Horology: time measuring systems or devices

Cases

Of particular material

368296, 423446, G04B 3700, G04B 3900, B01J 306, C01B 3106

Patent

active

061118214

ABSTRACT:
A transparent and scratchproof watch crystal, characterized in that it is made of polycrystalline diamond. The invention also concerns a watch case fitted with such a watch crystal.

REFERENCES:
patent: 3931704 (1976-01-01), Tominaga et al.
patent: 4002020 (1977-01-01), Klingenberg
patent: 4198811 (1980-04-01), Ratajski
patent: 4561783 (1985-12-01), Lederrey
Patent Abstracts Of Japan, vol. 6, No. 135 (C-115), Jul. 22, 982 & JP 57 061644 A (Seiko Epson Corp.) Apr. 14, 1982.

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