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| US5235127 | 30 Aug 1990 | 10 Aug 1993 | | Weapon discharge simulation system and electrostatically discharged pyrotechnic cartridge for use in said system |
| US6205927 | 6 Nov 1998 | 27 Mar 2001 | | Electric impulse cartridge |
| US6354033 | 17 Dec 1998 | 12 Mar 2002 | | Electric gun |
| US6499405 | 23 Aug 2000 | 31 Dec 2002 | | Connection and delay pyrotechnic device |
| US7083414 | 6 Nov 2002 | 1 Aug 2006 | | Explosion simulation device |
