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| All Patents in class 122/176 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,543X | Oct. 12, 1826 | D. Collings, J.D. Gallup | Anthracite coal applied to generating steam | ||
| 9,785X | Jun. 28, 1836 | W. Avery | Steam boiler | stationary boilers | |
| 43,301 | Jun. 28, 1864 | L.B. Flanders | Improvement in steam-boilers | stationary boilers | |
| 43,577 | Jul. 19, 1864 | L.B. Flanders | Improvement in steam-boilers | stationary boilers | |