Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4746169 | Apparatus for excavating passages | Konrad Schoen, Udo Wenzel | 1988-05-24 |
| 4495029 | Process for the preparation of coated paper and cardboard and coating materials for the performance of the process | Popko J. Westerhuis | 1985-01-22 |