Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5706422 | Method of locating fault of communication system | Hisayuki Maruyama, Jushi Ide, Seiichi Yasumoto, Ken Onuki, Toshio Ishihara +2 more | 1998-01-06 |
| 5497374 | Data transmission method and system thereof | Hisayuki Maruyama, Seiichi Yasumoto, Ken Onuki, Hisao Ogawa, Junji Fukuzawa +4 more | 1996-03-05 |
| 5426638 | Transmission method and system thereof | Hisayuki Maruyama, Seiichi Yasumoto, Ken Onuki, Hisao Ogawa, Junji Fukuzawa +4 more | 1995-06-20 |
| 5414739 | Transmission system constituted of multistage reproduction nodes | Naoya Kobayashi, Yoshitaka Takasaki, Hisayuki Maruyama, Hiroshi Mabuchi, Eiichi Amada | 1995-05-09 |
| 5247620 | Bridge apparatus with an address check circuit for interconnecting networks | Junji Fukuzawa, Akira Watanabe, Matsuaki Terada | 1993-09-21 |
| 5210632 | Signal transmission system having a star coupled repeater | Toshiyuki Murakami, Hisayuki Maruyama, Masato Satake, Masanori Kogawa, Naomasa Hanano | 1993-05-11 |
| 4704714 | Method of detecting recovery from fault in a data transmission system which effects loopback control | Hiroshi Tomizawa, Masakazu Okada, Seiichi Yasumoto, Hitoshi Fushimi, Ken Onuki +2 more | 1987-11-03 |
| 4604742 | Loop type data transmission system | Takuji Hamada, Masahiro Takahashi | 1986-08-05 |
| 4530085 | Reconfiguration control method for a loop-type data network | Takuji Hamada, Masahiro Takahashi, Hitoshi Fushimi, Seiichi Yasumoto | 1985-07-16 |
| 4510494 | Loop type data highway system | Takuji Hamada, Hiroshi Tomizawa, Hitoshi Fushimi | 1985-04-09 |
| 4401365 | Rotary type optical switch | Yoshiji Ito, Yasuo Hosoda, Hiroshi Kaita, Tadaaki Okada, Hiroaki Ohnishi +4 more | 1983-08-30 |
| 4398288 | Loop type data highway system for data transmission | Seiichi Yasumoto, Masahiro Takahashi | 1983-08-09 |
| 4349872 | Interrupt control system | Sigeru Fukasawa | 1982-09-14 |