|
| US5813461 | 12 Jul 1996 | 29 Sep 1998 | | Co-axial well construction technique for hazardous waste assessment and remediation |
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| US7127856 | 4 Jun 2004 | 31 Oct 2006 | Hans T. Hagen, Jr. Hans T. Hagen, III | Insulated stud panel and method of making such |
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