Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5157885 | Door leaf or casing frame and process for its manufacture | Siegfried Rock | 1992-10-27 |
| 5105596 | Window frame section and process for its manufacture | Siegfried Rock | 1992-04-21 |
| 4558638 | Ventilating profile frames for closure panels | Siegfried Rock, Hans-Peter Rainer, Reinhold Herzog, Gunter Kromus, Fritz Kolbl | 1985-12-17 |