Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4906431 | Method of producing a heat insulating separation wall | Wolfgang Simm | 1990-03-06 |
| 4906529 | Method of producing an erosion-resistant surface/layer on a metallic workpiece | Wolfgang Simm | 1990-03-06 |
| 4203948 | Air purifier of the regenerating type | — | 1980-05-20 |