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| All Patents in class 237/46 | |||||
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| Number | Date | Patentee | Title | Type | |
| 95,849 | Oct. 12, 1869 | B.F. Sturtevant | Hot Air Furnace | industrial furnaces | |
| 100,235 | Feb. 22, 1870 | B.F. Sturtevant | Grain Dryer | grain dryers | |