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| All Patents in class 34/138 | |||||
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| Number | Date | Patentee | Title | Type | |
| 84,193 | Nov. 17, 1868 | J.D. Flansburgh, W. Johnston | Coffee Roaster | coffee roasters | |
| 155,300 | Sep. 22, 1874 | J.H. Grubb | Apparatus for Treating Coffee | roasting coffee | |
| 255,965 | Apr. 04, 1882 | E.D. Barker, F.G. Fleury | Process of and Apparatus for Roasting Coffee | coffee roasters | |
| 587,090 | Jul. 27, 1897 | D.B. Fraser | Coffee Roaster | coffee roasters | |