Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D388373 | Tire tread | William Urbano Villamizar | 1997-12-30 |
| D386132 | Tire tread | William Urbano Villamizar, Hermanus Joannes Andries Vereecken, Maurice Graas | 1997-11-11 |
| D381606 | Tire tread | Maurice Graas, William Urbano Villamizar, Hermanus Joannes Andries Vereecken | 1997-07-29 |