Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5790290 | Optical distribution system having time switch | Shigeki Kitajima | 1998-08-04 |
| 5576872 | Optical distribution device, optical distribution circuit, and synthesizing method of distribution circuits | Shigeki Kitajima | 1996-11-19 |
| 5422967 | Self-routing optical switch and optical switch array | Hiroaki Inoue, Hirohisa Sano, Shinji Nishimura, Mari Ogawa, Koji Ishida | 1995-06-06 |