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| US4190091 | 26 sept. 1978 | 26 févr. 1980 | Sebastian Zuppichin Aldo Colognori | Screw, screwdriver and screw-holding attachment therefor | | US7901413 | 21 juil. 2006 | 8 mars 2011 | High Plains Technology Group, LLC | Surgical locking screw and driver arrangement |
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