Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4485603 | Insulating glass window structure | Paul Derner | 1984-12-04 |
| 4422280 | Insulating glass unit | Paul Derner, Wolf von Reis | 1983-12-27 |
| 4416101 | Insulating glass window structure | Paul Derner | 1983-11-22 |