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| All Patents in class 417/185 | |||||
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| Number | Date | Patentee | Title | Type | |
| 265,648 | Oct. 10, 1882 | G.C. Williams | Steam Injector | water injectors | |
| 536,415 | Mar. 26, 1895 | J.L. Bogert | Vacuum-pump | ||
| 2,330,275 | Sep. 28, 1943 | B.E. Folke | Injector Discharge Control Valve | water injectors | |