Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887256 | Data communication network system and reconfiguration control method | Jiro Kashio, Takeshi Harakawa | 1989-12-12 |
| 4847611 | Ring configuration of line concentrators | Yoshinori Bekki, Hiroyuki Wada, Mitsuhiro Yamaga | 1989-07-11 |
| 4815069 | Data communication network system and reconfiguration control method | Jiro Kashio, Takeshi Harakawa | 1989-03-21 |