Invention Grant
- Patent Title: Drill pipe protector
- Patent Title (中): 钻管保护器
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Application No.: US39414541Application Date: 1941-05-19
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Publication No.: US2378738APublication Date: 1945-06-19
- Inventor: SMITH WALTER G L
- Applicant: THERMOID COMPANY
- Assignee: Thermoid Company
- Current Assignee: Thermoid Company
- Priority: US39414541 1941-05-19
- Main IPC: E21B17/10
- IPC: E21B17/10
Information query
