EP 0948758 B1 20031210 - WATCH CRYSTAL AND METHOD OF FABRICATING THE SAME
Title (en)
WATCH CRYSTAL AND METHOD OF FABRICATING THE SAME
Title (de)
UHRENGLAS SOWIE VERFAHREN ZU DESSEN HERSTELLUNG
Title (fr)
GLACE DE MONTRE AINSI QUE SON PROCEDE DE FABRICATION
Publication
Application
Priority
- CH 9700352 W 19970918
- CH 241996 A 19961004
Abstract (en)
[origin: WO9815876A1] The invention concerns a watch crystal, oblong in shape, delimited by a plane lower face (20), a convex upper face (21), and four plane lateral faces (22, 24). The upper face is a toroidal surface, this form having the advantage, with respect to a spherical surface, of making the thickness of the lateral faces finer and more constant.
IPC 1-7
IPC 8 full level
G04B 39/00 (2006.01)
CPC (source: EP)
G04B 39/00 (2013.01); G04B 39/006 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9815876 A1 19980416; CH 690873 A5 20010215; DE 69726755 D1 20040122; DE 69726755 T2 20040923; EP 0948758 A1 19991013; EP 0948758 B1 20031210; HK 1019937 A1 20000303; JP 2001503139 A 20010306; JP 3892910 B2 20070314
DOCDB simple family (application)
CH 9700352 W 19970918; CH 241996 A 19961004; DE 69726755 T 19970918; EP 97938739 A 19970918; HK 99104575 A 19991015; JP 51704098 A 19970918