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| All Patents in class 34/75 | |||||
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| Number | Date | Patentee | Title | Type | |
| 246,274 | Aug. 23, 1881 | R.S. Jennings | Method of and Apparatus for Collecting the Aromatic and Volatile Substances From | roasting coffee | |
| 509,298 | Nov. 21, 1893 | D.P. Cardozo | Apparatus for Roasting Coffee or Other Substances | coffee roasters | |