发明授权
- 专利标题: Calculating-machine.
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申请号: US1900002044申请日: 1900-01-19
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公开(公告)号: US657674A公开(公告)日: 1900-09-11
- 发明人: POWELL WILLIAM G
- 申请人: FRANK CLARK , POWELL WILLIAM G
- 专利权人: Frank Clark,William G Powell
- 当前专利权人: Frank Clark,William G Powell
- 优先权: US1900002044 1900-01-19