Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865823 | Method for recovering gallium | Yukinori Minagawa, Minoru Tanaka, Kazumasa Arai, Gouichi Muramatsu | 1989-09-12 |
| 4809052 | Semiconductor memory device | Yasushiro Nishioka, Takeo Shiba, Hiroshi Shinriki, Kiichiro Mukai, Akihisa Uchida +4 more | 1989-02-28 |