Invention Grant
- Patent Title: Casing clamp for oil wells
- Patent Title (中): 油井套管夹
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Application No.: US44832221Application Date: 1921-02-28
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Publication No.: US1402092APublication Date: 1922-01-03
- Inventor: ROBINSON THOMAS E
- Applicant: ROBINSON THOMAS E
- Assignee: Thomas E Robinson
- Current Assignee: Thomas E Robinson
- Priority: US44832221 1921-02-28
- Main IPC: E21B19/12
- IPC: E21B19/12
Information query
