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| Patents Granted on 1970-01-13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,489,286 | Jan. 13, 1970 | M.R. Estabrook | Hydrocyclone separator with particle trap | separators | |
| 3,490,017 | Jan. 13, 1970 | T.B. Bullock, N.C. Kolell | Numerical Control Systems Employing Conversion of Changing Command Numbers Into Phase Analog Signals | nc and cnc apparatus | |