Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6795466 | Distributed feedback type semiconductor laser device | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2004-09-21 |
| 6714571 | Ridge type semiconductor laser of distributed feedback | Yoshiaki Watanabe, Kiyoshi Takei, Kiyofumi Chikuma | 2004-03-30 |