Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5410973 | Process and apparatus for the incineration of sewage sludge and refuse | Hans Kunstler, Erwin Wachter, Kurt Scholl | 1995-05-02 |
| 4758280 | Decorative black wear protection coating | Erich Bergmann | 1988-07-19 |