Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886971 | Ion beam irradiating apparatus including ion neutralizer | Yasushi Matsumura, Akira Shuhara, Kazumi Fukumoto, Hitoshi Takeya | 1989-12-12 |
| 4802045 | Recording tape cartridge | Osamu Yamamoto, Shinichi Kagano | 1989-01-31 |