Invention Grant
- Patent Title: Down hole pipe plugging tool
- Patent Title (中): 井下管堵塞工具
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Application No.: US790260Application Date: 1960-02-10
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Publication No.: US3074482APublication Date: 1963-01-22
- Inventor: WOODWARD CHARLES D
- Applicant: TEXACO INC
- Assignee: Texaco Inc
- Current Assignee: Texaco Inc
- Priority: US790260 1960-02-10
- Main IPC: E21B31/00
- IPC: E21B31/00
Public/Granted literature
- US5982166A Method for measuring a characteristic of a semiconductor wafer using cylindrical control Public/Granted day:1999-11-09
Information query
