Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5769992 | Process for the production of flexible surface filter material for dealing with noxious substances | — | 1998-06-23 |
| 5334436 | Flexible material including active particles, process for the production thereof, and protective clothing made therefrom | Karin Hobbs, Regina Hoffmann | 1994-08-02 |
| 4883052 | Protective breathing mask | Anna-Maria Weiss | 1989-11-28 |
| 4800190 | Filter material and process for the production thereof | — | 1989-01-24 |