Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889781 | Process and apparatus for producing a black matrix layer | Gerhard Mauz | 1989-12-26 |
| 4827185 | Color picture tube having internal conductive coatings | Norbert Thiel, Rolf Zondler, Otto Lederle | 1989-05-02 |