发明授权
- 专利标题: Metallic railway-tie.
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申请号: US1906321295申请日: 1906-06-11
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公开(公告)号: US842415A公开(公告)日: 1907-01-29
- 发明人: MUELLER AUGUST J
- 申请人: MUELLER AUGUST J
- 专利权人: August J Mueller
- 当前专利权人: August J Mueller
- 优先权: US1906321295 1906-06-11