Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6918479 | Diaphragm spring for a friction clutch | Ronald Beck, Alfred Schraut, Erwin Ziegler, Frank Hirschmann | 2005-07-19 |
| 6877596 | Diaphragm spring for a friction clutch | Ronald Beck, Alfred Schraut, Erwin Ziegler, Frank Hirschmann | 2005-04-12 |