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| Patents for William W. Dunn | |||||
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| Picture | Number | Date | Patentee | Title | |
| 266,790 | Oct. 31, 1882 | W.W. Dunn | Coffee Roaster | ||
| 284,728 | Sep. 11, 1883 | W.W. Dunn | Apparatus for Grain Drying and Coffee Roasting | ||