Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5024886 | Sealing sheets for roofs | Pierre Geisen | 1991-06-18 |
| 4680913 | Process for producing airtight sealing of buildings | Pierre Geisen, Bernard Ducret | 1987-07-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5024886 | Sealing sheets for roofs | Pierre Geisen | 1991-06-18 |
| 4680913 | Process for producing airtight sealing of buildings | Pierre Geisen, Bernard Ducret | 1987-07-21 |