发明名称 |
Wrist watch having certain parts covered with extra hard material |
摘要 |
The watch case of this inveniton includes means for fixing the crystal to the case having surfaces exposed at the exterior of the watch thus susceptible to being scratched. Such visible surfaces are protected by an armour formed essentially of a substrate made from a metallic carbide and a material covering the substrate such material having a hardness greater than 5000 HV0.25.
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申请公布号 |
US4674892(A) |
申请公布日期 |
1987.06.23 |
申请号 |
US19860852262 |
申请日期 |
1986.04.15 |
申请人 |
MONTRES RADO S.A. |
发明人 |
LOTH, ERIC |
分类号 |
G04B37/16;G04B37/14;G04B37/22;G04B39/02;(IPC1-7):G04B37/00 |
主分类号 |
G04B37/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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