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| All Patents in class 122/371 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,796X | Oct. 13, 1831 | P. Cooper | Steam engine boiler | stationary boilers | |
| 272,578 | Feb. 20, 1883 | B.N. Payne, J. Oldham | Steam Boiler | stationary boilers | |