Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6793760 | Cleaning agent for PVC surfaces | Horst Hoffmann, Karl-Heinz Rogmann, Joerg-Peter Gehrke | 2004-09-21 |
| 5980681 | Process for treatment of metal workpiece surface by electrical discharges | Peter Siemroth, Bernd Schultrich, Sven Grosser | 1999-11-09 |
| 4382772 | Insert tubes for rich gas burners in the heating flues of coke ovens and method and apparatus for inserting or removing the same | Folkard Wackerbarth, Heinz Thubeauville | 1983-05-10 |