Invention Grant
- Patent Title: Joint for rods
- Patent Title (中): 杆接头
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Application No.: US49327721Application Date: 1921-08-18
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Publication No.: US1660455APublication Date: 1928-02-28
- Inventor: RALPH PLUMB
- Applicant: RALPH PLUMB
- Assignee: Plumb Ralph
- Current Assignee: Plumb Ralph
- Priority: US49327721 1921-08-18
- Main IPC: E21B17/043
- IPC: E21B17/043
Information query
