Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4658667 | Gear-change device for a multi-ratio gear-change hub for bicycles or the like | — | 1987-04-21 |
| 4343613 | Derailler system | Berndt Leiter, Josef Keller, Ewald Eisend | 1982-08-10 |