Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6319968 | Acoustically effective bituminous mass for hot application, method for the production thereof, and bituminous sheet material made therefrom | Zdislaw KORNACKI | 2001-11-20 |
| 5823301 | Brake pads and process for their production | Christoph Freist | 1998-10-20 |
| 4833018 | Magnetic, hot-melt adhering soundproofing sheet | Karl Ruehl | 1989-05-23 |
| 4618521 | Corrosion protection sheet | Karl Ruhl | 1986-10-21 |
| 4473606 | Foils | Karl Ruhl | 1984-09-25 |