Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4993469 | Device for protection from the sun | — | 1991-02-19 |
| 4754592 | Composite window | Wolfram Scheler | 1988-07-05 |
| 4654243 | Device for guiding daylight | Heinz Rentzsch, Georg Lang, Herbert Mueller | 1987-03-31 |