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| All Patents in class 451/56 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,576,201 | Nov. 27, 1951 | J.C. Wilson | Grinding Method and Machine | ||
| 2,585,990 | Feb. 19, 1952 | W.G. Baldenhofer | Method of grinding intricate contours | ||
| 2,586,755 | Feb. 19, 1952 | J.C. Wilson | Method and Apparatus for Grinding | ||
| 2,778,170 | Jan. 22, 1957 | E.V. Flanders | Method of Grinding, Including Grinding Wheel Forming | ||
| 4,274,231 | Jun. 23, 1981 | J. Verega | Method and Apparatus for Dressing a Grinding Wheel | ||