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| All Patents in class 91/195 | |||||
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| Number | Date | Patentee | Title | Type | |
| 24,838 | Jul. 19, 1859 | H.R. Worthington | Pumping Engine | pumps | |
| 292,525 | Jan. 29, 1884 | C.C. Worthington | Duplex pumping-engine | steam pumping engines | |
| 2,009,487 | Jul. 30, 1935 | R. Thoreson, W. Ernst | Hydraulic Press | hydraulic presses | |