Invention Grant
- Patent Title: Tamping plug for boreholes
- Patent Title (中): 用于钻孔的夯实塞
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Application No.: US21066662Application Date: 1962-07-18
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Publication No.: US3173368APublication Date: 1965-03-16
- Inventor: GRIFFITH GEORGE L , WELLS FRANKLIN B
- Applicant: TROJAN POWDER CO
- Assignee: Trojan Powder Co
- Current Assignee: Trojan Powder Co
- Priority: US21066662 1962-07-18
- Main IPC: F42D1/18
- IPC: F42D1/18
Information query
