Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4999031 | Removing CO.sub.2 and, if necessary, H.sub.2 S from gases | Werner Hefner | 1991-03-12 |
| 4786384 | Electroytic cell for treatment of metal ion containing industrial waste water | Wolfgang Gehlert, Edgar Gluck | 1988-11-22 |