Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801640 | Polyester film having improved abrasion resistance manufactured from particle-filled polyester having nucleating agent dispersed therein | Hermann Dallmann, Werner Schaefer, Wolfgang Gawrisch | 1989-01-31 |
| 4798759 | Multi-layer polyester film for magnetic tape | Hermann Dallman, Werner Schafer | 1989-01-17 |