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| All Patents in class 426/618 | |||||
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| Number | Date | Patentee | Title | Type | |
| 167,383 | Sep. 07, 1875 | J.H. Conrad, J.H. Bell | Improvements in Composition for Glazing Roasted Coffee | coffee roasters | |
| 645,535 | Mar. 13, 1900 | F. Linde | Process of Roasting Malt with Coffee | roasting coffee | |