Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6588974 | Bitumen or asphalt for producing a road topping, road topping and method for the production of bitumen or asphalt | Ferdinand Richter, Michael Matthai, Bruno Iversen, Klaus-Werner Damm | 2003-07-08 |