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| All Patents in class 409/18 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 510,122 | Dec. 05, 1893 | U. Eberhardt, H.E. Eberhardt, F.L. Eberhardt | Gear-cutting and hobbing machine | |
 | 1,143,570 | Jun. 15, 1915 | F. Burgess | Gear hobber | |
 | 1,308,126 | Jul. 01, 1919 | C.H. Taylor | Gear making attachment for turret lathe | |
| 1,516,477 | Nov. 18, 1924 | J.K. Schofield | Lost Motion Means for Gear Hobbing Machines | ||
| 2,888,858 | Jun. 02, 1959 | A.D. Moncrieff | Hobbing Machine | ||
| 2,950,655 | Aug. 30, 1960 | A.D. Moncrieff | Hobbing Machine | ||