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| Patents for Ralph S. Jennings | |||||
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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 | |
| 308,169 | Nov. 18, 1884 | R.S. Jennings | Method and Device for Roasting Coffee | coffee roasters | |