Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D388375 | Tire tread | Richard Heinen | 1997-12-30 |
| D388379 | Tire tread | Maurice Graas | 1997-12-30 |
| D388380 | Tire tread | Richard Heinen | 1997-12-30 |
| D388035 | Tire tread | Richard Heinen, Alain Alphonse Z. S. Klepper, Bernard Jean Francois Croissant | 1997-12-23 |
| D382520 | Tire tread | Richard Heinen, Alain Alphonse Z. S. Klepper | 1997-08-19 |