Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5116294 | Stair climbing exercise apparatus | — | 1992-05-26 |
| 5033733 | Stair climbing exercise apparatus | — | 1991-07-23 |
| 5031902 | Rotary motion transmission system for exercise bicycle | — | 1991-07-16 |
| 4880224 | Rowing machine | Werner Jonas | 1989-11-14 |