Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830951 | Naphtholactamsquaric acid dyes and optical recording materials containing these dyes | Matthias Dust, Peter Neumann, Peter Hauser, Heidi Benthack-Thoms, Helmut Barzynski +2 more | 1989-05-16 |
| 4829509 | Optical recording medium, its preparation and its use as a read only memory information carrier | Wolfgang Schrott, Peter Neumann, Peter Hauser | 1989-05-09 |
| 4820757 | Polymers photostabilized by novel imidazole-2-carboxanilides | Peter Spang, Peter Neumann, Hubert Trauth | 1989-04-11 |