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| All Patents in class 220/318 | |||||
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| Number | Date | Patentee | Title | Type | |
| 150,752 | May 12, 1874 | I. Dunham | Improvement in Cooking Utensils | roasters | |
| 305,959 | Sep. 30, 1884 | P.A. Peterson | Coffee Roaster | coffee roasters | |