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| All Patents in class 407/28 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 392,597 | Nov. 13, 1888 | T. Eynon | Cutting-tool for milling and gear-cutting machines | |
 | 579,570 | Mar. 30, 1897 | E.R. Fellows | Cutter and cutter-head for gear-shaping machine | |
| 1,689,973 | Oct. 30, 1928 | O. Severson | Cutter for Planing Gear Teeth | ||
| 2,124,126 | Jul. 19, 1938 | G.R. Scott | Cutting Tool | ||
| 2,386,572 | Oct. 09, 1945 | R.J. Pigott | Metalworking Machine | ||
| 2,962,799 | Dec. 06, 1960 | A.D. Moncrieff | Gear Cutting Device | ||