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| Patents Granted on 1968-02-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,369,327 | Feb. 20, 1968 | M.R. Estabrook | Honing machine with stroke length control | honing machines | |
| 3,369,330 | Feb. 20, 1968 | M.R. Estabrook, D.K. Greenberg | Automatic abrading machine | ||
| 3,369,433 | Feb. 20, 1968 | I.O. Johansson | Apparatus for cutting transverse notches in a belt end | industrial machine pulleys and belt drive mechanisms | |
| 3,369,820 | Feb. 20, 1968 | R.E. Reed, R.A. Lehmkuhl | Power Chuck | milling machine accessories | |