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| Patents Granted on 1970-09-29 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,531,403 | Sep. 29, 1970 | M.R. Estabrook | Method for decontaminating fluid | ||
| 3,531,615 | Sep. 29, 1970 | F.X. Zammit | Electrical discharge machining with step driven electrode | electrical discharge machining | |