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| All Patents in class 432/83 | |||||
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| Number | Date | Patentee | Title | Type | |
| 196,274 | Oct. 16, 1877 | J.B. Underwood | Combined Coffee Roaster and Cooler | coffee roasters | |
| 1,906,092 | Apr. 25, 1933 | G.S. Peterson | Conveyer furnace | ||