Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835031 | Profiled strip with smooth reinforcing insert and method of its manufacture | Gerd Strutz | 1989-05-30 |
| 4809463 | Window frame with reinforced sealing strips | Ludger Buller, Ludger Hemmis | 1989-03-07 |