Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831309 | Cathode ray tube apparatus | Shigeya Ashizaki, Osamu Konosu, Hiroshi Suzuki | 1989-05-16 |
| 4814670 | Cathode ray tube apparatus having focusing grids with horizontally and vertically oblong through holes | Hiroshi Suzuki, Chisato Kurusu | 1989-03-21 |