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| All Patents in class 417/198 | |||||
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| Number | Date | Patentee | Title | Type | |
| 35,575 | Jun. 10, 1862 | J. Millholland | Improvement in Giffard's injectors | feedwater apparatus | |
| 206,054 | Jul. 16, 1878 | H.P. Tenant | Steam-Jet Pump | steam pumps | |