Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671308 | Optical waveguide having diffraction grating area and method of fabricating the same | Akira Inoue, Yasuji Hattori, Katsuya Yamashita, Fumio Ohtsuki | 1997-09-23 |
| 5625710 | Character recognition apparatus using modification of a characteristic quantity | Hiroshi Iwaki, Takafumi Edanami, Noriyuki Fukuyama | 1997-04-29 |