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| Patents for De Witt C. Smith | |||||
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| Number | Title | Classification(s) | |||
| 107,555 | Improvement in machines for dovetailing window-sash | 144/89, 83/875 | |||
| 321,762 | Lathe for turning polygonal forms | 142/52 | |||
| 321,763 | Wood-turning lathe | 142/52 | |||