Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4663236 | Coated photographic base material | Reiner Anthonsen, Heinz Trentmann, Wieland Sack | 1987-05-05 |
| 4309486 | Electrostatic recording material | Wieland Sack, Reiner Anthonsen | 1982-01-05 |