Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5082070 | Hollow drill bit | Josef Obermeier, Rolf Spangenberg | 1992-01-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5082070 | Hollow drill bit | Josef Obermeier, Rolf Spangenberg | 1992-01-21 |