Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6672123 | System for cold-forming a flange | Frank Siewert, Jurgen Bergmann | 2004-01-06 |
| 6076387 | Process for rolling bevel gears on an axial stamping rolling machine and tooling for its implementation | Frank Siewert | 2000-06-20 |