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| All Patents in class 407/26 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 527,410 | Oct. 16, 1894 | C.M. Conradson | Gear Cutter | ||
| 924,679 | Jun. 15, 1909 | E.J. Lees | Hob for Gear Cutters | ||
| 2,698,477 | Jan. 04, 1955 | J.O. Jarno | Hob | ||