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| All Patents in class 220/752 | |||||
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| Number | Date | Patentee | Title | Type | |
| 289,312 | Nov. 27, 1883 | P.B. Sheldon | Coffee Roaster and Corn Popper | coffee roasters | |
| 2,078,497 | Apr. 27, 1937 | H.L. Johnston | Food handling apparatus | ||