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| Patents for Daniel H. Southworth | |||||
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| Picture | Number | Date | Patentee | Title | |
| AI48 | Aug. 12, 1841 | D.H. Southworth | Cleaning rice, wheat, and other small grain | ||
 | 7,827 | Dec. 10, 1850 | D.H. Southworth | Planing-machine | |
 | 7,942 | Feb. 18, 1851 | D.H. Southworth | Planing-machine | |