发明授权
- 专利标题: Stuffing-box.
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申请号: US1908416082申请日: 1908-02-15
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公开(公告)号: US888166A公开(公告)日: 1908-05-19
- 发明人: HEGGEM ALFRED G
- 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: US1908416082 1908-02-15
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