发明授权
- 专利标题: Sand-reel.
- 专利标题(中): SAND-REEL
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申请号: US1909472648申请日: 1909-01-16
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公开(公告)号: US938609A公开(公告)日: 1909-11-02
- 发明人: SANDS LOUIS C
- 申请人: OIL WELL SUPPLY CO
- 专利权人: Oil Well Supply Co
- 当前专利权人: Oil Well Supply Co
- 优先权: US1909472648 1909-01-16
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