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| Patents Granted on 1973-03-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,720,135 | Mar. 13, 1973 | R.E. Stobbe, K.R. Merner | Feedrate Controller | machine tool controls | |
| GB-1,309,893 | Mar. 14, 1973 | Z. Brierley | Shredder | ||
| 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 | |