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| Patents Granted on 1969-03-25 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,434,244 | Mar. 25, 1969 | J. Decker | Grinding Machinery for Finishing Brake Discs | surface grinders | |
| 3,434,247 | Mar. 25, 1969 | N.T. Anton, L.H. Daughetee | Vibratory tool | reciprocating or vibrating electric motors | |
| 3,435,326 | Mar. 25, 1969 | R. Zechlin | Static Exciter Regulator for Generators | electric generators | |