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| Patents Granted on 1965-04-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,178,739 | Apr. 20, 1965 | W.M. Ritter, H.R. Plummer | Double Float Tool Holder | milling machine tools | |
| 3,178,801 | Apr. 20, 1965 | E.J. Krueger | Cutting Tool Assembly | insert tool holders | |
| 3,179,425 | Apr. 20, 1965 | R.H. Andersen | Rotary Seal Employing a Flexible Sleeve | shaft seals | |