Invention Grant
- Patent Title: Differential motion for traversing card grinding rollers
- Patent Title (中): 移动卡片磨辊的差速运动
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Application No.: US33055329Application Date: 1929-01-05
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Publication No.: US1785731APublication Date: 1930-12-23
- Inventor: JAMES DRONSFIELD
- Applicant: JAMES DRONSFIELD
- Assignee: Dronsfield James
- Current Assignee: Dronsfield James
- Priority: GB1785731X 1928-03-24
- Main IPC: B24B19/18
- IPC: B24B19/18
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