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| All Patents in class 83/351 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 16,290 | Dec. 23, 1856 | L. Skeels | Circle-cutting shear | ||
| 1,992,211 | Feb. 26, 1935 | F.M. Hooley | Sheet Metal and Pipe Cutter | ||