- 专利标题: Metallic railway-tie and fastening.
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申请号: US1450015申请日: 1915-03-15
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公开(公告)号: US1162067A公开(公告)日: 1915-11-30
- 发明人: JOHNSON BARNET M
- 申请人: JOHNSON BARNET M
- 专利权人: Barnet M Johnson
- 当前专利权人: Barnet M Johnson
- 优先权: US1450015 1915-03-15