Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671308 | Optical waveguide having diffraction grating area and method of fabricating the same | Akira Inoue, Katsuya Yamashita, Fumio Ohtsuki, Yutaka Katsuyama | 1997-09-23 |
YH
Yasuji Hattori
NTT: 1 patents #69 of 290Top 25%
Overall (1997): #57,846 of 185,788Top 35%
1
Patents 1997