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| All Patents in class 409/112 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE5,458 | Jun. 17, 1873 | T.W. Minter | Engraving and Carving Machines | metal engraving machines | |
| 1,797,139 | Mar. 17, 1931 | G. Gorton | Engraving Machine and the Like | metal engraving machines | |
| 2,100,953 | Nov. 30, 1937 | P.M. Henkes, G. Gorton | Engraving and Related Machines | metal engraving machines | |
| 2,289,874 | Jul. 14, 1942 | F.W. Curtis | Milling Machine | milling machines | |