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| US4913440 | 1 Dec 1988 | 3 Apr 1990 | Performance Golf Products, Inc. | Golf club swing training apparatus |
| US5004243 | 16 Oct 1989 | 2 Apr 1991 | | Golf practice apparatus |
| US5333875 | 7 Dec 1992 | 2 Aug 1994 | Optronics, Ltd. | Alignment system for golf ball driving and hitting mat |
| US5350177 | 3 Mar 1993 | 27 Sep 1994 | | Golf club swing training apparatus |
| US5655974 | 13 Aug 1996 | 12 Aug 1997 | | Golf playing surface assembly |
| US5690557 | 11 Sep 1996 | 25 Nov 1997 | | Putting practice device |
| US5743804 | 11 Mar 1997 | 28 Apr 1998 | | Hands-free golf ball teeing device |
| US6569041 | 4 Feb 2002 | 27 May 2003 | | Ice hockey training apparatus |
| US7063624 | 10 Oct 2003 | 20 Jun 2006 | | Golf training apparatus and method of using the same |
