Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844777 | Water-resistant photographic paper support | Reiner Anthonsen, Wieland Sack | 1989-07-04 |
| 4364971 | Waterproof photographic paper and method of producing same | Wieland Sack, Reiner Anthonsen | 1982-12-21 |