|
| US4109661 | 3 nov. 1976 | 29 août 1978 | | Footwear having pressure projections |
| US4177803 | 29 août 1977 | 11 déc. 1979 | | Foot exerciser |
| US4694839 | 24 mars 1986 | 22 sept. 1987 | | Auxiliary stimulation apparatus for apnea distress |
| US5577995 | 14 juin 1993 | 26 nov. 1996 | Grace L. Walker | Spinal and soft tissue mobilizer |
| US5802743 | 23 sept. 1997 | 8 sept. 1998 | | Structure of massaging slipper |