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| Patents Granted on 1991-06-04 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,020,205 | Jun. 04, 1991 | G.A. Wridt | Freeze Plug Installer Head and Tool Kit Including Same | ||
| 5,020,399 | Jun. 04, 1991 | D.M. Eggert, J.R. Annis | Self-Adjusting Pliers with Curved Handles | pliers | |