发明授权
- 专利标题: Concrete-incased pile.
- 专利标题(中): 混凝土桩
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申请号: US1908460548申请日: 1908-10-31
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公开(公告)号: US910453A公开(公告)日: 1909-01-19
- 发明人: BLACK JOHN C , EATON JAMES F
- 申请人: BLACK JOHN C , EATON JAMES F
- 专利权人: John C Black,James F Eaton
- 当前专利权人: John C Black,James F Eaton
- 优先权: US1908460548 1908-10-31
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