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| All Patents in class 122/291 | |||||
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| Number | Date | Patentee | Title | Type | |
| 381,870 | Apr. 24, 1888 | A. Worthington | Boiler | stationary boilers | |
| 579,784 | Mar. 30, 1897 | L. Baker | Stationary boiler | stationary boilers | |
| RE12,052 | Nov. 04, 1902 | H.L. Wilson | Steam-boilers | traction engine boilers | |
| RE12,053 | Nov. 04, 1902 | H.L. Wilson | Steam-boiler | traction engine boilers | |