Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4976424 | Load control for exercise device | Bruce A. Sargeant, Mark J. Hoffenberg, Robert A. Walpert | 1990-12-11 |
| 4938475 | Bicycle racing training apparatus | Bruce A. Sargeant, Mark J. Hoffenberg, Robert A. Walpert | 1990-07-03 |
| 4834363 | Bicycle racing training apparatus | Bruce A. Sargeant, Mark J. Hoffenberg, Robert A. Walpert | 1989-05-30 |