Invention Grant
- Patent Title: Valve for rock drills
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Application No.: US41353529Application Date: 1929-12-12
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Publication No.: US1777336APublication Date: 1930-10-07
- Inventor: SMITH JR WILLIAM A
- Applicant: INGERSOLL RAND CO
- Assignee: Ingersoll-Rand Co
- Current Assignee: Ingersoll-Rand Co
- Priority: US41353529 1929-12-12
- Main IPC: B25D9/20
- IPC: B25D9/20
Information query
