发明授权
- 专利标题: Closure for hopper of hopper type railway cars
- 专利标题(中): 料斗式铁路车料斗的封闭
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申请号: US12821049申请日: 1949-11-18
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公开(公告)号: US2640440A公开(公告)日: 1953-06-02
- 发明人: DOREY GEORGE B
- 申请人: ENTPR RAILWAY EQUIPMENT CO
- 专利权人: Entpr Railway Equipment Co
- 当前专利权人: Entpr Railway Equipment Co
- 优先权: US12821049 1949-11-18
- 主分类号: B61D7/20
- IPC分类号: B61D7/20