Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5078912 | Wood preservative | Reimer Goettsche, Hans-Norbert Marx, Wendelin Hettler, Hans-Peter Heidenreich | 1992-01-07 |
| 4716054 | Accelerated fixing of chromate-containing wood preservative salts | Hans-Norbert Marx, Wendelin Hettler, CLAUS FLORIAN WAGNER | 1987-12-29 |