发明授权
- 专利标题: Automatic vacuum air-valve.
- 专利标题(中): 自动真空空气阀。
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申请号: US1910586408申请日: 1910-10-10
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公开(公告)号: US998033A公开(公告)日: 1911-07-18
- 发明人: O'BRIEN ARTHUR
- 申请人: ALF C KREMER , WILLIAM M KIRKPATRICK , O'BRIEN ARTHUR
- 专利权人: Alf C Kremer,William M Kirkpatrick,Arthur O'brien
- 当前专利权人: Alf C Kremer,William M Kirkpatrick,Arthur O'brien
- 优先权: US1910586408 1910-10-10
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