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| All Patents in class 451/114 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,254,240 | Sep. 02, 1941 | E.A. Overstedt | Machine for Finishing Gears | gear making machines | |
| 2,257,195 | Sep. 30, 1941 | J.D. Rovick | Internal Gear Finishing Machine | gear making machines | |
| 2,915,853 | Dec. 08, 1959 | F.J. Machovec | Portable mower conditioning unit | ||