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| US5183133 | 13 mars 1991 | 2 févr. 1993 | Canadian Aging & Rehabilitation Product Development Corporation | Motor-driven chair |
| US5236055 | 11 juil. 1991 | 17 août 1993 | Canadian Aging & Rehabilitation Product Development Corporation | Wheel with coaxial drive system mounted in the wheelhub field of the invention |
| US7148594 | 12 févr. 2003 | 12 déc. 2006 | | Axial gap electrical machine |
