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| Patents Granted on 1991-03-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,996,895 | Mar. 05, 1991 | R.B. Puig | Pocket hand corkscrew | mechanical cork extractors | |
| 4,997,191 | Mar. 05, 1991 | D.J. Warner | Adjustable Shaft Seal and Method of Adjustment | shaft seals | |
| 5,001,798 | Mar. 26, 1991 | H.F. Hamilton | Drive-on vehicle supporting arrangement | vehicle body and frame repairer | |