Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5248450 | Composition for use an an agent or concentrate for the preservation of wood or wood materials | Wolfgang Metzner, Hans-Werner Wegen | 1993-09-28 |
| 5196407 | Composition for preserving wood and wood materials | Peter Goletz | 1993-03-23 |