Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874985 | Phosphor and electron excited fluorescent display device using the same | Takashi Hase | 1989-10-17 |
| 4839207 | Optical recording medium and process for producing the same | Toshihiko Yoshitomi, Yoshimitsu Kobayashi, Yoshiyuki Kisaka, Michikazu Horie, Takanori Tamura +1 more | 1989-06-13 |