Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5283106 | Nonwoven material of two or more layers, in particular with long-term filter properties and manufacture thereof | Peter Heidel | 1994-02-01 |
| 4234651 | Process for the manufacture of a non-woven product having high shear strength and dimensional stability | Helmut Kuhn | 1980-11-18 |