Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5312541 | Improvements in processes for coloring anodized aluminum and/or aluminum alloys | Jean-Francois Paulet, Bruno Boetsch, Fritz Schneeberger, Günther Tscheulin | 1994-05-17 |
| 4531979 | Sealing of anodically oxidized aluminum or aluminum alloy surfaces and compounds useful therefor | Ernst Weisskopf | 1985-07-30 |
| 4439562 | Polymeric material mass-dyed with certain metalized bis-azomethine dyestuffs | — | 1984-03-27 |