Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4939012 | Naphtholactam dyes and optical recording medium containing these dyes | Matthias Dust, Peter Neumann, Ernst Schefczik, Heidi Benthack-Thoms, Helmut Barzynski +2 more | 1990-07-03 |