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| Patents for L. B. Southworth | |||||
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| Number | Date | Patentee | Title | Type | |
| 18,877 | Dec. 15, 1857 | R.N. Watrous | Drawing Knife | draw knives | |
| 42,124 | Mar. 29, 1864 | L.B. Southworth | Improvement in jointing and burring saws | saw sharpening machines | |