Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4594306 | Light-sensitive copying material with o-quinone diazide and phenolic hydroxy compound | Paul Stahlhofen | 1986-06-10 |
| 4530895 | Aqueous-alkaline solution and process for developing positive-working reproduction layers | Ulrich Simon | 1985-07-23 |