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| Patents Granted on 1983-03-01 | |||||
| Number | Date | Patentee | Title | Type | |
| 4,375,128 | Mar. 01, 1983 | W. Linquist | Manual keyway punching tool | metal punches | |
| 4,375,174 | Mar. 01, 1983 | S.E. Shanley, Jr. | Adjustable End Wrench Releasable Locking Feature | screw adjust wrenches | |