Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4935457 | Fiberboard method and composition | Wolfgang Metzner, Eberhard Osterloff | 1990-06-19 |
| 4824484 | Agent for preserving wood or wood-based materials and method for preparation and use thereof | Wolfgang Metzner | 1989-04-25 |