Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4813918 | A plate link chain for radially variable width pulley drives having thrust members of different lengths | Hans-Jurgen Wolf | 1989-03-21 |
| 4795406 | Asymmetrical infinitely variable transmission system | Otto Dittrich | 1989-01-03 |