Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4635738 | Drill bit | Hans Schillinger, Klaus Pahlke, Siegfried Starke, Heinz-Juergen Panhorst | 1987-01-13 |
| 4515226 | Tooth design to avoid shearing stresses | Hermann Munzel | 1985-05-07 |