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| All Patents in class 34/164 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 260,672 | Jul. 04, 1882 | J.W. Drummond | Means for Roasting Coffee | ||
| 563,801 | Jul. 14, 1896 | A.F. Ramos | Method of and Apparatus for Drying Coffee | ||
 | 2,346,500 | Apr. 11, 1944 | R.C. Moore | Drying method and apparatus | |