Invention Grant
- Patent Title: Drill cutter
- Patent Title (中): 钻刀
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Application No.: US62765745Application Date: 1945-11-09
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Publication No.: US2533258APublication Date: 1950-12-12
- Inventor: MORLAN ERWIN A , WOODS HENRY B
- Applicant: HUGHES TOOL CO
- Assignee: Hughes Tool Co
- Current Assignee: Hughes Tool Co
- Priority: US62765745 1945-11-09
- Main IPC: E21B10/16
- IPC: E21B10/16
Information query
