Invention Grant
- Patent Title: Roller-bearing.
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Application No.: US1906297520Application Date: 1906-01-23
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Publication No.: US847274APublication Date: 1907-03-12
- Inventor: BELKNAP ELLSWORTH
- Applicant: WILLIAM C ROSS
- Assignee: William C Ross
- Current Assignee: William C Ross
- Priority: US1906297520 1906-01-23
Information query
