Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5815502 | Information transmission system with variable transmission rate | Atsushi Saito, Taizo Kinoshita, Shigeki Kitajima | 1998-09-29 |
| 5515368 | Information transmission system with variable transmission rate | Atsushi Saito, Taizo Kinoshita, Shigeki Kitajima | 1996-05-07 |
| 5430733 | Digital transmission system for multiplexing and demultiplexing signals | — | 1995-07-04 |
| 5418405 | Installation path network for distribution area | — | 1995-05-23 |
| 5414739 | Transmission system constituted of multistage reproduction nodes | Naoya Kobayashi, Sadao Mizokawa, Hisayuki Maruyama, Hiroshi Mabuchi, Eiichi Amada | 1995-05-09 |
| 5369517 | Optical subscriber network transmission system | — | 1994-11-29 |
| 5175639 | Optical subscriber network transmission system | — | 1992-12-29 |
| 5140453 | Optical receiving method utilizing polarization diversity and apparatus for carrying out the same | Hideaki Tsushima, Katsuyuki Imoto, Hirohisa Sano, Akihiko Takase, Minoru Maeda | 1992-08-18 |
| 5121244 | Optical subscriber network transmission system | — | 1992-06-09 |
| 5121381 | Optical switching apparatus for digital signal cross connection and method of interswitch optical transmission of digital signals | Yasushi Takahashi | 1992-06-09 |
| 5113524 | Quantum state control apparatus, optical receiver and optical communication system | Osamu Hirota, Hideaki Tsushima, Shinya Sasaki, Minoru Maeda | 1992-05-12 |
| 5042027 | Communication network system and method of controlling a communication network | Akihiko Takase, Masahiro Takatori, Yoshiaki Takemura, Naoya Kobayashi, Yasushi Sawada +3 more | 1991-08-20 |
| 5023604 | Communication system | Akihiko Takase | 1991-06-11 |
| 4970719 | Digital signal multiplexing apparatus | Akihiko Takase | 1990-11-13 |
| 4967410 | Method of multiplexing digital signals and apparatus therefor | Akihiko Takase | 1990-10-30 |
| 4796281 | Digital signal transmission system | — | 1989-01-03 |
| 4723312 | Light emitting diode driver circuit | Kiichi Yamashita, Katsuyoshi Harasawa | 1988-02-02 |
| 4604745 | Method of searching fault locations in digital transmission line | Kiichi Yamashita, Yasushi Takahashi | 1986-08-05 |
| 4504943 | Time domain multiplexer | Katsuyuki Nagano, Yasushi Takahashi, Mitsuo Tanaka | 1985-03-12 |
| 4503546 | Pulse signal transmission system | Hiroki Yoshine, Yasushi Takahashi, Mitsuo Yamada, Katsuyuki Nagano | 1985-03-05 |
| 4459698 | Variable equalizer | Osamu Yumoto, Toshiro Suzuki, Hiroshi Takatori | 1984-07-10 |
| 4410980 | Time division multiplexing system | Mitsuo Tanaka | 1983-10-18 |
| 4330856 | Digital signal transmission system including means for converting asynchronous signals to the operating speed of a transmission line | Hiroki Yoshine | 1982-05-18 |
| 4320527 | Bit synchronizing system for pulse signal transmission | — | 1982-03-16 |
| 4262263 | Variable equalizer | — | 1981-04-14 |