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| All Patents in class 409/91 | |||||
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| Number | Date | Patentee | Title | Type | |
| 75,413 | Mar. 10, 1868 | I. Hall | Improvement in machines for carving in wood | carving machines | |
| 274,391 | Mar. 20, 1883 | M.J. Salm | Engraving Machine | metal engraving machines | |
| 769,931 | Sep. 13, 1904 | G.A. Baghurst | Carving-machine | carving machines | |
| 3,192,832 | Jul. 06, 1965 | J. Müller | Tracer Milling Machine | copy milling machines | |
| 3,286,598 | Nov. 22, 1966 | J. Müller | Duplicating Milling Machine | copy milling machines | |