Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5581386 | Method of terminal control signal transmission and photonic switching system incorporating said method | — | 1996-12-03 |
| 5471332 | Hitless switching apparatus and method for optical network | Tatsuya Shiragaki, Takahiro Shiozawa, Masahiko Fujiwara | 1995-11-28 |
| 5272555 | Bidirectional optical transmission method and apparatus therefor | — | 1993-12-21 |
| 5018130 | High-speed optical packet switching system using optical buffer between incoming and outgoing channels | Hiroshi Suzuki | 1991-05-21 |
| 5005166 | Time and wavelength division switching system | Makoto Nishio | 1991-04-02 |
| 4945531 | Optical wavelength-division multiplex transmission system with an optical filter for spontaneous emission noise | — | 1990-07-31 |
| 4845703 | Wavelength division optical switching system having wavelength switching light modulators | — | 1989-07-04 |
| 4822124 | Optical matrix switch | — | 1989-04-18 |
| 4802175 | Opto-electric logic elements | — | 1989-01-31 |