发明授权
- 专利标题: Piston.
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申请号: US16051517申请日: 1917-04-07
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公开(公告)号: US1252281A公开(公告)日: 1918-01-01
- 发明人: MCGREGOR HENRY A , KETCHAM NATHANIEL
- 申请人: MCGREGOR HENRY A , KETCHAM NATHANIEL
- 专利权人: Henry A Mcgregor,Nathaniel Ketcham
- 当前专利权人: Henry A Mcgregor,Nathaniel Ketcham
- 优先权: US16051517 1917-04-07
公开/授权文献
- US10808848B2 Valve device 公开/授权日:2020-10-20
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