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| All Patents in class 409/35 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,750,029 | Mar. 11, 1930 | W.E. Sykes | Method of Cutting Gear Teeth | ||
| 2,107,543 | Feb. 08, 1938 | E.W. Miller | Plural Gear Shaping Machine | ||