Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5105522 | Process of manufacturing a friction ring provided with a sinter-bonded friction facing | Roitner Franz | 1992-04-21 |
| 4940847 | Method for manufacturing a friction ring having a conical or cylindrical friction surface | — | 1990-07-10 |
| 4917743 | Method for manufacturing a friction ring having a conical or cylindrical friction surface | Ferdinand Mairhofer | 1990-04-17 |