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| Patents for William H. Lenhart | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 252,481 | Jan. 17, 1882 | W.H. Lenhart | Lathe for turning eccentric or polygonal forms | |
| 293,891 | Feb. 19, 1884 | W.H. Lenhart | Lathe for turning eccentric or polygonal forms | ||
| 355,540 | Jan. 04, 1887 | W.H. Lenhart | Tubular Cutter Lathe | ||
| 437,339 | Sep. 30, 1890 | W.H. Lenhart | Eccentric or polygonal lathe | ||