Invention Grant
- Patent Title: Rock-drill.
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Application No.: US1907385865Application Date: 1907-07-27
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Publication No.: US981036APublication Date: 1911-01-10
- Inventor: TROTT ROLLAND S
- Applicant: TROTT ROLLAND S
- Assignee: Rolland S Trott
- Current Assignee: Rolland S Trott
- Priority: US1907385865 1907-07-27
- Main IPC: E21B1/18
- IPC: E21B1/18
Information query
