Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863882 | Rare earth oxysulfide ceramics | Naotoshi Matsuda, Kazuto Yokota | 1989-09-05 |
| 4804882 | Cathode-ray tube including a white phosphor screen | Takeshi Takahara, Mitsuhiro Oikawa, Yoshinori Tetsuishi, Kazuaki Higuchi | 1989-02-14 |