Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4917743 | Method for manufacturing a friction ring having a conical or cylindrical friction surface | Johann Gramberger | 1990-04-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4917743 | Method for manufacturing a friction ring having a conical or cylindrical friction surface | Johann Gramberger | 1990-04-17 |