- 专利标题: Apparatus for controlling railway switches
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申请号: US21172238申请日: 1938-06-04
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公开(公告)号: US2208993A公开(公告)日: 1940-07-23
- 发明人: LOGAN JR JOHN W
- 申请人: UNION SWITCH & SIGNAL CO
- 专利权人: Research Institute for Medicine and Chemistry Inc
- 当前专利权人: Research Institute for Medicine and Chemistry Inc
- 优先权: US21172238 1938-06-04
- 主分类号: B61L5/06
- IPC分类号: B61L5/06 ; B61L19/06
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