Referenced by|
| US3968967 | 28 Mar 1975 | 13 Jul 1976 | | Symmetrically arranged, hemispherical ball rebounding elements | | US4101132 | 5 Dec 1975 | 18 Jul 1978 | Richard N. Conrey
Phillip T. McQuaid | Electronic athletic equipment | | US5249810 | 5 Nov 1992 | 5 Oct 1993 | | Counting paddle toy | | US5377996 | 20 May 1993 | 3 Jan 1995 | Shure Products Inc. | Electronic paddle game device |
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