Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868420 | Flip-flop circuit | Masayoshi Yagyu, Toshio Yamada, Masaru Osanai, Akira Masaki, Mitsuo Usami +2 more | 1989-09-19 |
| 4857427 | Recording medium | Takafumi Ishii, Tetsuo Satoh | 1989-08-15 |
| 4803065 | Production process of chlorine | Yoshitsugu Kono, Masanobu Ajioka, Shinji Takenaka, Masafumi Kataita | 1989-02-07 |