发明名称 |
Method of manufacture of watch case |
摘要 |
A watch case is made from an electrically conductive hard material compounded from aluminum oxide and titanium carbide by forming a blank by sintering the material, subjecting the blank to a heat treatment, spark machining the blank to its final form, and fine grinding and polishing the blank to a desired finish.
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申请公布号 |
US4087894(A) |
申请公布日期 |
1978.05.09 |
申请号 |
US19760745708 |
申请日期 |
1976.11.29 |
申请人 |
SOCIETE SUISSE POUR L"INDUSTRIE HORLOGERE MANAGEMENT SERVICES, S.A. |
发明人 |
KUECHLI, GOTTFRIED;VOLGYI, PAUL |
分类号 |
C04B35/10;B23H1/00;G04B37/22;(IPC1-7):B23P13/00 |
主分类号 |
C04B35/10 |
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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