Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854021 | Stufferbox crimper and process for preparing crimped synthetic fibers | Ulrich Reinehr, Rolf-Burkhard Hirsch, Hermann-Josef Jungverdorben, Jakob Breuer | 1989-08-08 |
| 4804511 | Process for dry spinning yarns of improved uniformity and reduced adhesion | Hans K. Burghartz, Rolf-Burkhard Hirsch, Norbert Rink | 1989-02-14 |