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| Patents for Valentin Merklen | |||||
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| Picture | Number | Date | Patentee | Title | |
| 245,739 | Aug. 16, 1881 | V. Merklen | Cutter Head for Lathes | ||
 | 245,740 | Aug. 16, 1881 | V. Merklen | Lathe for tuning spirals | |
 | RE10,765 | Sep. 21, 1886 | V. Merklen | Lathe for turning spirals | |
 | 390,884 | Oct. 09, 1888 | V. Merklen | Spiral lathe | |