Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879413 | Process for the preparation of a solid adduct of sulfuric acid and urea | Hansjorg Buser | 1989-11-07 |
| 4366232 | Method for processing photographic silver dye-bleach materials and suitable preparations | Hansjorg Buser | 1982-12-28 |