Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5748893 | Network interface apparatus | Tetsuhiko Hirata, Minoru Koizumi, Masayo Nagano, Yoshiaki Adachi, Hiroshi Wataya | 1998-05-05 |
| 5706422 | Method of locating fault of communication system | Hisayuki Maruyama, Jushi Ide, Seiichi Yasumoto, Sadao Mizokawa, Toshio Ishihara +2 more | 1998-01-06 |
| 5497374 | Data transmission method and system thereof | Hisayuki Maruyama, Sadao Mizokawa, Seiichi Yasumoto, Hisao Ogawa, Junji Fukuzawa +4 more | 1996-03-05 |
| 5426638 | Transmission method and system thereof | Hisayuki Maruyama, Sadao Mizokawa, Seiichi Yasumoto, Hisao Ogawa, Junji Fukuzawa +4 more | 1995-06-20 |
| 4855993 | Method and apparatus for detecting a fault in a ring network data transmission system | Takuji Hamada, Masahiro Takahashi, Katsuhiko Yoneda, Toshihiko Uchiyama | 1989-08-08 |
| 4704714 | Method of detecting recovery from fault in a data transmission system which effects loopback control | Hiroshi Tomizawa, Masakazu Okada, Seiichi Yasumoto, Sadao Mizokawa, Hitoshi Fushimi +2 more | 1987-11-03 |