Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4611751 | Method and apparatus for the manufacture of cylindrical hollow bodies | Ulrich Plantikow, Siegfried Grone | 1986-09-16 |
| 4604511 | Method for producing heavy structural elements | Josef Grosse-Wordemann | 1986-08-05 |