Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4766594 | Digital network system having arrangement for testing digital subscriber line | Yasunori Ogawa, Yasuo Tanaka, Ryoji Shimozono | 1988-08-23 |
| 4754273 | System for controlling network activation sequence | Sumie Okada, Takashi Nara, Takashi Hatano, Yutaka Kawato, Ryoji Shimozono +2 more | 1988-06-28 |