Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6913416 | Bitumen or asphalt for the production of road surfaces, road surfaces, and method for the preparation of bitumen or asphalt | Günter Hildebrand, Ferdinand Richter, Michael Matthai, Klaus-Werner Damm | 2005-07-05 |
| 6588974 | Bitumen or asphalt for producing a road topping, road topping and method for the production of bitumen or asphalt | Günter Hildebrand, Ferdinand Richter, Michael Matthai, Klaus-Werner Damm | 2003-07-08 |