Invention Grant
- Patent Title: Variable-speed gear.
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Application No.: US1906305655Application Date: 1906-03-12
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Publication No.: US839512APublication Date: 1906-12-25
- Inventor: ROBINSON WILLIAM E
- Applicant: ROBINSON WILLIAM E
- Assignee: William E Robinson
- Current Assignee: William E Robinson
- Priority: US1906305655 1906-03-12
Information query
