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| Patents for Downs & Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 24,266 | May 31, 1859 | A. Orvis | Grinding-mill | |
 | 39,617 | Aug. 18, 1863 | H.F. Phillips | Improvement in Axle-Skeins | |
| D2,293 | Apr. 03, 1866 | B.S. Nichols | Design for a pump | ||