Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5442621 | ISDN switching system having testing facilities | Noboru Ise, Kenji Tsutsumi, AYA TAKAGI, Hiroyuki Kudoh, Hiroshi Adachi +2 more | 1995-08-15 |
| 4812839 | System for controlling network activation sequence | Sumie Okada, Takashi Nara, Takashi Hatano, Yutaka Kawato, Kenji Tsutsumi +2 more | 1989-03-14 |
| 4766594 | Digital network system having arrangement for testing digital subscriber line | Yasunori Ogawa, Kenji Tsutsumi, Yasuo Tanaka | 1988-08-23 |
| 4754273 | System for controlling network activation sequence | Sumie Okada, Takashi Nara, Takashi Hatano, Yutaka Kawato, Kenji Tsutsumi +2 more | 1988-06-28 |
| 4599583 | Mixed dual frequency generating system | Yasunori Ogawa, Yasuo Tanaka, Shigeo Sano | 1986-07-08 |