Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7464531 | Method for visually displaying the maintaining of specified effects | Iris Biermann, Christoph Haase | 2008-12-16 |
| 7454889 | Method for producing an effect yarn on an open-end rotor spinning machine, and corresponding effect yarn | Iris Biermann, Wolfgang Doerner, Christoph Haase, Ralf Siewert | 2008-11-25 |
| 7412818 | Rotor spinning machine | Wolfgang Doerner, Ralf Siewert | 2008-08-19 |
| 7392648 | Rotor Spinning machine | Iris Biermann, Christoph Haase, Karl Kamps, Ralf Siewert | 2008-07-01 |