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| All Patents in class 426/438 | |||||
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| Number | Date | Patentee | Title | Type | |
| 75,828 | Mar. 24, 1868 | B.T. Babbitt | Improved Process for Preserving Coffee | roasting coffee | |
| 245,996 | Aug. 23, 1881 | W.P. Clotworthy | Process of Roasting Coffee | roasting coffee | |