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| All Patents in class 417/168 | |||||
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| Number | Date | Patentee | Title | Type | |
| 376,315 | Jan. 10, 1888 | S.L. Kneass | Injector | water injectors | |
| 541,620 | Jun. 25, 1895 | S.L. Kneass | Injector | water injectors | |
| 625,267 | May 16, 1899 | S.L. Kneass | Injector | water injectors | |
| 683,914 | Oct. 08, 1901 | J. Desmond | Injector | water injectors | |