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| All Patents in class 122/44.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,387X | Feb. 18, 1831 | L. Disbrow | Compound furnace steam boiler | stationary boilers | |
| 6,387 | Apr. 24, 1849 | J. Burdge, W.F. Converse | Machinery for Cutting Screws on Rails for Bedsteads | wood threading machines | |
| 616,380 | Dec. 20, 1898 | C.G. Wernicke | Boiler | traction engine boilers | |