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| All Patents in class 122/76 | |||||
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| Number | Date | Patentee | Title | Type | |
| 344,071 | Jun. 22, 1886 | R.W. Aitken | Steam Boiler | stationary boilers | |
| 389,250 | Sep. 11, 1888 | W.N. Rumely | Steam Boiler | traction engine boilers | |
| 440,284 | Nov. 11, 1890 | C. Sprague | Boiler | traction engine boilers | |
| 616,380 | Dec. 20, 1898 | C.G. Wernicke | Boiler | traction engine boilers | |