Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6767424 | Hot-melt adhesive for glueing DVDs | Ruediger Butterbach, Dirk Bonke, Siegfried Kopannia | 2004-07-27 |
| 6677394 | Swellable hotmelt adhesive | Ruediger Butterbach, Siegfried Kopannia, Marcus Heemann | 2004-01-13 |
| 6228456 | Hot-melt adhesive for gluing digital versatile discs | Ruediger Butterbach, Siegfried Kopannia, Jean-Louis REQUIN | 2001-05-08 |
| 5883172 | Polyamide hotmelt adhesive | Reimar Heucher, Siegfried Kopannia | 1999-03-16 |