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| US6008975 | 20 Nov 1998 | 28 Dic 1999 | McGraw-Edison Company | Self-compressive surge arrester module and method of making same |
| US6831232 | 16 Jun 2002 | 14 Dic 2004 | | Composite insulator |
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| US7041913 | 6 Abr 2004 | 9 May 2006 | | Method and arrangement for providing a gas-tight housing joint |
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| US7329444 | 12 May 2003 | 12 Feb 2008 | Pomm Plastics, Co | Composite poles with an integral mandrel and methods of making the same |
