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| All Patents in class 204/297.14 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,461,059 | Aug. 12, 1969 | E.C. Krueger | Power operated electro-chemical fixture | ||
| 3,664,947 | May 23, 1972 | M.M. Bass | Work holder for electrochemical abrading machine | ||