Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886335 | Optical fiber switch system | Toshihiro Ochiai, Hidehisa Miyazawa, Shizuka Yamaguchi, Tsuyoshi Fumeno, Hiroshi Raijo +1 more | 1989-12-12 |
| 4868816 | Polling communication method | Minoru Katsumata, Kousaku Ohta, Katsuzou Inao, Koh Ichinowatari | 1989-09-19 |