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| All Patents in class 417/533 | |||||
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| Number | Date | Patentee | Title | Type | |
| 655,232 | Aug. 07, 1900 | C.L. Heisler | Pumping Engine | steam pumping engines | |
| 974,061 | Oct. 25, 1910 | C.L. Heisler | Pump | piston pumps | |