Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5659010 | Nonlinear optical material, process of production of same, and nonlinear optical device and directional coupling type optical switch using same | Wataru Sotoyama, Tetsuzo Yoshimura, Azuma Matsuura, Tomoaki Hayano | 1997-08-19 |
| 5612449 | Nonlinear optical material, process of production of same, and nonlinear optical device and directional coupling type optical switch using same | Wataru Sotoyama, Tetsuzo Yoshimura, Azuma Matsuura, Tomoaki Hayano | 1997-03-18 |
| 5594093 | Nonlinear optical material and nonlinear optical device and directional coupling type optical switch using same | Wataru Sotoyama, Tetsuzo Yoshimura, Azuma Matsuura, Tomoaki Hayano | 1997-01-14 |