发明授权
- 专利标题: Water-tube boiler.
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申请号: US1913798362申请日: 1913-10-30
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公开(公告)号: US1104379A公开(公告)日: 1914-07-21
- 发明人: OFELDT AUGUST W
- 申请人: OFELDT AUGUST W
- 专利权人: August W Ofeldt
- 当前专利权人: August W Ofeldt
- 优先权: US1913798362 1913-10-30