Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880666 | Method of manufacturing magnetic recording medium | Hajime Takeuchi, Minoru Hashimoto, Toshio Fukaya, Masumi Koishi | 1989-11-14 |
| 4833276 | Shield structure of electronic equipment | — | 1989-05-23 |