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| All Patents in class 91/54 | |||||
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| Number | Date | Patentee | Title | Type | |
| 262,286 | Aug. 08, 1882 | H.F. Gaskill | Vertical Pumping Engine | water pumps | |
| 1,432,636 | Oct. 17, 1922 | F.E. Stevenson | Duplex Pumping Engine | pumps | |