发明授权
- 专利标题: Grinder for crushed ores, & c.
- 专利标题(中): 磨碎的ORES磨砂机
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申请号: US1899715512申请日: 1899-05-04
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公开(公告)号: US646484A公开(公告)日: 1900-04-03
- 发明人: WISWELL JOHN F , SMITH FRANK B
- 申请人: ROBERT H LAIRD , WISWELL JOHN F , SMITH FRANK B
- 专利权人: Robert H Laird,John F Wiswell,Frank B Smith
- 当前专利权人: Robert H Laird,John F Wiswell,Frank B Smith
- 优先权: US1899715512 1899-05-04
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