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| All Patents in class 205/663 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,826,540 | Mar. 11, 1958 | G.F. Keeleric | Method and apparatus for electrolytic cutting, shaping, and grinding | ||
 | 2,946,731 | Jul. 26, 1960 | J.J. Falls | Method and apparatus for electrolytic shaping | |
| 3,684,673 | Aug. 15, 1972 | L.V. Colwell | Method and apparatus for analyzing and controlling the cleaning operation of an electrochemical grinding device | ||