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| All Patents in class 122/114 | |||||
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| Number | Date | Patentee | Title | Type | |
| 89,240 | Apr. 20, 1869 | T.T. Prosser | Improvement in steam-generators | steam generators | |
| 193,085 | Jul. 17, 1877 | B. Holly | Steam Generator | stationary boilers | |
| 240,299 | Apr. 19, 1881 | B. Brazelle | Steam-generator | steam generators | |
| 458,413 | Aug. 25, 1891 | B. Brazelle | Steam-boiler | stationary boilers | |