Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806211 | Aluminum alloy product with uniformly grey, light-fast surface and process for its manufacture | Jurgen Timm, Jorg Maier | 1989-02-21 |
| 4798656 | Process for electrolytically dyeing an anodic oxide layer on aluminum or aluminum alloys | — | 1989-01-17 |