发明授权
- 专利标题: Loose-leaf binder.
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申请号: US1911643780申请日: 1911-08-12
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公开(公告)号: US1003824A公开(公告)日: 1911-09-19
- 发明人: THOMAS GEORGE W
- 申请人: JOHN M HALBERT , THOMAS GEORGE W
- 专利权人: John M Halbert,George W Thomas
- 当前专利权人: John M Halbert,George W Thomas
- 优先权: US1911643780 1911-08-12
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