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| All Patents in class 173/5 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,401,276 | May 28, 1946 | L.L. Schauer, J.H. McKewen | Tripping mechanism | drill presses | |
| 2,603,113 | Jul. 15, 1952 | J.E. Shriver | Machine tool | drill presses | |