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| Patents Granted on 1991-05-07 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,012,581 | May 07, 1991 | D.P. Cummings, D.H. Mallalieu, W.D. Fletcher | Universal Utility Knife | utility knives | |
| 5,012,703 | May 07, 1991 | H. Reinbacher | Cork removal apparatus | non worm cork extractors | |