Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881798 | Thermal optical modulation method and device using alternating current | Satoshi Yuasa, Yoko Yoshinaga, Masahiro Haruta, Yukuo Nishimura | 1989-11-21 |
| 4873178 | Optical recording medium and method for conducting recording on said medium | Masahiro Haruta, Yoko Kuwae, Satoshi Yuasa, Etsuko Sugawa | 1989-10-10 |
| 4832466 | Optical element | Yukuo Nishimura, Satoshi Yuasa, Masahiro Haruta, Yoko Yoshinaga | 1989-05-23 |
| 4818665 | Medium and process for image formation | Masahiro Haruta, Hiroshi Matsuda, Yukuo Nishimura | 1989-04-04 |
| 4804613 | Optical recording medium and optical recording process using such medium | Hiroshi Matsuda, Masahiro Haruta, Yoshinori Tomita, Takashi Hamamoto | 1989-02-14 |