发明授权
- 专利标题： Wrist watch having certain parts covered with extra hard material
- 专利标题（中）： 具有某些部分的腕表，包含额外的硬质材料
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申请号： US852262申请日： 1986-04-15
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公开(公告)号： US4674892A公开(公告)日： 1987-06-23
- 发明人: Eric Loth
- 申请人： Eric Loth
- 申请人地址： CHX Lengnau
- 专利权人： Montres Rado S.A.
- 当前专利权人： Montres Rado S.A.
- 当前专利权人地址： CHX Lengnau
- 优先权： CHX1616/85 19850416
- 主分类号： G04B37/16
- IPC分类号： G04B37/16 ; G04B37/14 ; G04B37/22 ; G04B39/02 ; G04B37/00
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 HV.sub.0.25.
公开/授权文献
- US5375306A Method of manufacturing homogeneous non-woven web 公开/授权日：1994-12-27