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| All Patents in class 417/182 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,625,797 | Jan. 20, 1953 | J.H. Shaver, H.H. Poort | Hydraulic eductor valve | hydraulic apparatus | |
| 3,057,417 | Oct. 09, 1962 | R.L. Sandvig | Drill system with suction removal of cuttings | ||