Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4582448 | Releasable wheel axle device | Charles J. Helton, III | 1986-04-15 |
| 4474385 | Removable wheel assembly for wheelchairs | Charles J. Helton, III, Martin B. Frank | 1984-10-02 |
| 4422660 | Removable wheel assembly for wheelchairs | Charles J. Helton, III, Martin B. Frank | 1983-12-27 |