|
| US4373720 | 6 Aug 1980 | 15 Feb 1983 | Jimmy Connors Rally Champion Enterprise | Tennis practice backboard |
| US4451036 | 2 Jul 1981 | 29 May 1984 | | Batting practice device |
| US4516771 | 23 Dec 1982 | 14 May 1985 | | Batting aid |
| US5029852 | 21 Jun 1990 | 9 Jul 1991 | | Bat swing guide apparatus |
| US5087039 | 26 Mar 1991 | 11 Feb 1992 | | Baseball bat swing training device |
| US5273277 | 2 Oct 1992 | 28 Dec 1993 | | Ball hitting training device |
| US5322276 | 12 Jan 1993 | 21 Jun 1994 | | Bat swing guide |
| US5340101 | 4 Oct 1993 | 23 Aug 1994 | | Training apparatus for batters |
| US5386986 | 4 Feb 1993 | 7 Feb 1995 | | Baseball batting practice device |
| US5478070 | 21 Feb 1995 | 26 Dec 1995 | | Ball and bat trainer tee and guide assembly |
| US5624113 | 17 Oct 1995 | 29 Apr 1997 | | Portable batting system |
| US7331881 | 16 Dec 2004 | 19 Feb 2008 | | Portable fence-mountable basketball goal and method |
| US8172696 | 2 Sep 2011 | 8 May 2012 | Calgolf LLC | Sports training device |
