Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5694731 | Fire resistant frame structure for windows, doors, facades or glass roofs | Armin Tonsmann, Frank Mantwill, Siegfried Habicht | 1997-12-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5694731 | Fire resistant frame structure for windows, doors, facades or glass roofs | Armin Tonsmann, Frank Mantwill, Siegfried Habicht | 1997-12-09 |