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| All Patents in class 417/193 | |||||
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| Number | Date | Patentee | Title | Type | |
| 224,762 | Feb. 24, 1880 | J.S. Bancroft | Injector for Feeding Boilers | water injectors | |
| 851,041 | Apr. 23, 1907 | W.T. Strain | Injector | water injectors | |
| 2,389,656 | Nov. 27, 1945 | E. Henkel, A. Williams | Injector | water injectors | |