Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D386132 | Tire tread | William Urbano Villamizar, Michel Alfred Marie Oscar Breny, Maurice Graas | 1997-11-11 |
| D381606 | Tire tread | Maurice Graas, Michel Alfred Marie Oscar Breny, William Urbano Villamizar | 1997-07-29 |