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| All Patents in class 110/326 | |||||
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| Number | Date | Patentee | Title | Type | |
| 485,112 | Oct. 25, 1892 | H.H. Nieman | Flue-protector for steam-boilers | steam fire engines | |
| 616,380 | Dec. 20, 1898 | C.G. Wernicke | Boiler | traction engine boilers | |