Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6203649 | Method of manufacturing a flat friction ring | Gerhard Hartner | 2001-03-20 |
| 6105234 | Method of producing a flat friction disk | Gerhard Hartner, Johann Hartner, Bruno Burtlmair, Klaus-Peter Lassl | 2000-08-22 |