Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883270 | Four-bar variable-resistance frontal calf developing machine | — | 1989-11-28 |
| 4840373 | Four-bar rigid-drive variable resistance pectoral fly machine | — | 1989-06-20 |
| 4838548 | Four-bar variable resistance leg extension machine | — | 1989-06-13 |
| 4828254 | Crank and slider/four-bar variable resistance carriage-type leg press machine | — | 1989-05-09 |
| 4822038 | Calf isolating exercise machine | — | 1989-04-18 |