Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873120 | Method of manufacturing cathode-ray tube | Hidemi Matsuda, Mamoru Yoshizako, Osamu Yagi | 1989-10-10 |
| 4831307 | Cathode ray tube with light reflection film | Shigeo Takenaka, Hidemi Matsuda | 1989-05-16 |