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| Patents Granted on 1973-03-27 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,722,102 | Mar. 27, 1973 | H.B. Bak, R.H. Jackson | Dip Stick | industrial machine lubrication | |
| 3,723,016 | Mar. 27, 1973 | R.A. Lehmkuhl | Spindle Depth Control | machine tool controls | |