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| Patents for Benjamin K. Maltby | |||||
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| Number | Date | Patentee | Title | Type | |
| 78,386 | May 26, 1868 | B.K. Maltby | Coffee Roaster | coffee roasters | |
| 89,490 | Apr. 27, 1869 | B.K. Maltby | Coffee Roaster | coffee roasters | |