Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703899 | Gain-coupling distributed feedback semiconductor and method of producing the same | — | 1997-12-30 |
| 5663592 | Semiconductor device having diffraction grating | Seiichi Miyazawa, Mitsuru Ohtsuka | 1997-09-02 |