Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5002863 | Naphtholactamtrimethine dyes and optical recording medium containing same | Matthias Dust, Peter Neumann, Michael Acker, Klaus D. Schomann, Harald Kuppelmaier | 1991-03-26 |
| 4939012 | Naphtholactam dyes and optical recording medium containing these dyes | Matthias Dust, Peter Neumann, Ernst Schefczik, Helmut Barzynski, Klaus D. Schomann +2 more | 1990-07-03 |
| 4904566 | Optical recording medium containing an azulenium dye | Wolfgang Schrott, Bernhard Albert, Peter Neumann | 1990-02-27 |
| 4876356 | Naphtholactam dyes and optical recording medium containing these days | Matthias Dust, Peter Neumann, Ernst Schefczik, Helmut Barzynski, Klaus D. Schomann +2 more | 1989-10-24 |
| 4830951 | Naphtholactamsquaric acid dyes and optical recording materials containing these dyes | Matthias Dust, Peter Neumann, Peter Hauser, Gerhard Wagenblast, Helmut Barzynski +2 more | 1989-05-16 |