Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4731217 | Method for melt spinning thermoplastic filament yarn | Siegmar Gerhartz, Rolf Kalthoff | 1988-03-15 |
| 4504021 | Ribbon free wound yarn package and method and apparatus for producing the same | Heinz Schippers, Erich Lenk, Gerhard Martens, Manfred Mayer, Werner Pieper | 1985-03-12 |