Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872924 | Method of producing shadow mask of color cathode ray tube | Akira Misumi | 1989-10-10 |
| 4833361 | Impregnated cathode having cathode base body and refractory metal support welded together | Yukio Suzuki | 1989-05-23 |