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| All Patents in class 125/11.04 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 203,515 | May 07, 1878 | R.W. Wheeler | Spherical lathe | |
| 2,981,038 | Apr. 25, 1961 | E.V. Flanders | Method of Grinding Helical Forms | ||
| 3,662,732 | May 16, 1972 | W.J. Knuff, G. Banko | Grinding Wheel Dresser | ||