Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6038901 | Method and device for producing press-rolled pipes with inner wall thickenings at the ends | Bernd Stein, Wilhelm Zimmermann, Heinz Steinhauer | 2000-03-21 |
| 4458049 | Preparation of cocondensates which produce weather-resistant bonding | Hans Diem, Robert Fritsch, Guenther Matthias, Hermann Schatz, Otto Wittmann | 1984-07-03 |