|
| US4240637 | 23. Okt. 1978 | 23. Dez. 1980 | | Putting practice apparatus |
| US4538814 | 4. Sept. 1984 | 3. Sept. 1985 | | Trifunctional golfing cage |
| US4541632 | 1. Mai 1984 | 17. Sept. 1985 | | Golf ball teeing apparatus |
| US4564198 | 4. Nov. 1982 | 14. Jan. 1986 | | Apparatus for use in playing a ball game |
| US4592547 | 4. Sept. 1984 | 3. Juni 1986 | | Tennis practice and game apparatus |
| US4761009 | 25. Febr. 1987 | 2. Aug. 1988 | | Golf putting game device |
| USD316120 | 7. Okt. 1987 | 9. Apr. 1991 | Habitat International, Inc. | Golf putting device |
