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| US6841791 | 16 Jul 2003 | 11 Ene 2005 | Meridian Research and Development | Multiple hazard protection articles and methods for making them |
| US7476889 | 20 Dic 2004 | 13 Ene 2009 | Meridian Research and Development | Radiation detectable and protective articles |
| US8020552 | 26 Feb 2007 | 20 Sep 2011 | Microtek Medical, Inc. | Helmets and methods of making and using the same |
