- 专利标题: Roller side bearing for railway-cars.
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申请号: US1914858792申请日: 1914-08-27
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公开(公告)号: US1240636A公开(公告)日: 1917-09-18
- 发明人: WILLIAMS WILLIAM ERASTUS
- 申请人: WILLIAMS WILLIAM ERASTUS
- 专利权人: William Erastus Williams
- 当前专利权人: William Erastus Williams
- 优先权: US1914858792 1914-08-27