Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9115296 | Bituminous emulsions | Robert Q. Kluttz, Keith E. Stephens, Willem C. Vonk | 2015-08-25 |
| 7230041 | Bituminous compositions | Erik Trommelen, Duco Bodt, Johan Plantinga | 2007-06-12 |
| 5798401 | Bituminous composition | Willem C. Vonk, Jeroen Van Westrenen | 1998-08-25 |