Water tight watch case using an inorganic glass crystal
    2.
    发明授权
    Water tight watch case using an inorganic glass crystal 失效
    防水表壳采用无机玻璃水晶

    公开(公告)号:US3939646A

    公开(公告)日:1976-02-24

    申请号:US471053

    申请日:1974-05-17

    申请人: Hideaki Uchiyama

    发明人: Hideaki Uchiyama

    CPC分类号: G04B37/02 G04B39/00

    摘要: A water-tight watch case having an inorganic glass crystal to which a layer of transparent or semi-transparent water-absorptive material is applied to a central region of the inner surface thereof to leave a bare peripheral region at which the crystal is hermetically sealed to the case.

    摘要翻译: 一种具有无机玻璃晶体的水密性表壳,将透明或半透明吸水材料层施加到其内表面的中心区域,以留下晶体被气密密封的裸露周边区域 案子。