|
| US3999756 | 10 Sep 1975 | 28 Dec 1976 | Prince Manufacturing, Inc. | Tennis racket |
| US4013289 | 8 Apr 1976 | 22 Mar 1977 | | Tennis racket |
| US4034984 | 7 Oct 1975 | 12 Jul 1977 | Wm. T. Burnett & Co., Incorporated | Lacrosse stick |
| US4076239 | 29 Jul 1976 | 28 Feb 1978 | Sherman R. Plummer
Randall Porter | Tennis teaching aid |
| US4079935 | 25 Mar 1976 | 21 Mar 1978 | Zimm-Zamm Aktiengesellschaft | Sports equipment |
| US4090707 | 29 Apr 1976 | 23 May 1978 | | Tennis racquet sounding device |
| US4101132 | 5 Dec 1975 | 18 Jul 1978 | Richard N. Conrey
Phillip T. McQuaid | Electronic athletic equipment |
| US4141549 | 19 May 1977 | 27 Feb 1979 | | Tennis racket |
| US4143873 | 13 Mar 1978 | 13 Mar 1979 | | Practice tennis racket with racket head insert |
| US4168065 | 31 Mar 1977 | 18 Sep 1979 | | Racket |
| US4231575 | 23 Dec 1977 | 4 Nov 1980 | Mers Kutt | Racket stringing |
| US4249731 | 31 Oct 1977 | 10 Feb 1981 | | Game racket |
| US4750734 | 12 Jun 1986 | 14 Jun 1988 | | Hand exerciser |
| US4844478 | 24 May 1988 | 4 Jul 1989 | | Racket game for beach and kit therefor |
| US5186699 | 12 Nov 1991 | 16 Feb 1993 | | Functional exercise attachment trainer for swung athletic implements |
| US5533724 | 18 Jul 1994 | 9 Jul 1996 | Hing Fat Toys Manufacturer Limited | Sport rackets |
| US5807196 | 31 Mar 1995 | 15 Sep 1998 | | Tennis practice device |
| US6110075 | 31 Oct 1998 | 29 Aug 2000 | | Finger and wrist exerciser |
| US7121983 | 14 Aug 2003 | 17 Oct 2006 | Power Web International | Hand exerciser |
| US7985147 | 10 Sep 2010 | 26 Jul 2011 | | Swing training device |
| US7993220 | 2 Jun 2010 | 9 Aug 2011 | | Exercise racquet |
| US8066623 | 21 Feb 2006 | 29 Nov 2011 | | In-water training and rehabilitation device |
