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| US4008536 | 10 Mar 1975 | 22 Feb 1977 | | Detachable gun sight mounts |
| US5210953 | 6 Sep 1991 | 18 May 1993 | | Durable sight system for a firearm |
| US5918374 | 23 Sep 1997 | 6 Jul 1999 | Thompson & Campbell Limited | Sight for a firearm and firearm including same |
| US6968643 | 3 Feb 2004 | 29 Nov 2005 | | Dual-zero sight for a firearm |
| US7181882 | 29 Nov 2005 | 27 Feb 2007 | | Dual-zero sight for a firearm |
