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| All Patents in class 417/202 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,632,392 | Mar. 24, 1953 | W.H. Tinker | Pumping Apparatus | ||
| 3,389,660 | Jun. 25, 1968 | R.E. Gerrstrum, R.F. Van Allen | Pump with pressure relief | ||