Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889756 | Sheet-like, multilayer, laser-optical recording material | Helmut Barzynski, Heidi Benthack-Thomas, Karl Hellwig | 1989-12-26 |
| 4866114 | Self-extinguishing, thermoplastic polyphenylene ether/polyamide molding materials and their use for the production of moldings | Hermann Gausepohl, Klaus Boehlke | 1989-09-12 |
| 4797453 | Graft polymers of polyphenylene ethers | Hermann Gausepohl, Erhard Seiler, Lothar Schlemmer | 1989-01-10 |