Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6015169 | Connector for concrete pipes | Norbert Funke | 2000-01-18 |
| 5876467 | Use of carboxylic esters as fuel additives or lubricant additives and their preparation | Arthur Hohn, Knut Oppenlander, Wolfgang H. H. Gunther, Harald Schwahn | 1999-03-02 |