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| All Patents in class 110/234 | |||||
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| Number | Date | Patentee | Title | Type | |
| 344,970 | Jul. 06, 1886 | W.J. Liddell | Portable steam-boiler furnace | stationary boilers | |
| 522,331 | Jul. 03, 1894 | G.S. Strong | Regenerative-boiler setting | stationary boilers | |