Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4719135 | Fuel impervious polymeric article | Ernst Gerdes, Franz Pellengahr | 1988-01-12 |
| 4514467 | Method of obtaining a positive bond between painted articles and concrete | Heinz Riemer, Joern Weiss | 1985-04-30 |
| 4442245 | Emulsion based on epoxy resins and diammonium salts and its preparation | Jorn-Volker Weiss, Heinz Riemer | 1984-04-10 |