Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6926583 | Grinding wheel | Rolf Spangenberg, Francois Boland, Jean-Pierre Chevalier | 2005-08-09 |
| 5911620 | Pot-shaped grinding wheel | Rolf Spangenberg | 1999-06-15 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6926583 | Grinding wheel | Rolf Spangenberg, Francois Boland, Jean-Pierre Chevalier | 2005-08-09 |
| 5911620 | Pot-shaped grinding wheel | Rolf Spangenberg | 1999-06-15 |