Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807227 | Optical wavelength-division switching system with coherent optical detection system | Masahiko Fujiwara, Kazuhisa Kaede | 1989-02-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807227 | Optical wavelength-division switching system with coherent optical detection system | Masahiko Fujiwara, Kazuhisa Kaede | 1989-02-21 |