Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4815090 | Distributed feedback semiconductor laser with monitor | Shigeyuki Akiba, Katsuyuki Utaka, Yuichi Matsushima | 1989-03-21 |
| 4796274 | Semiconductor device with distributed bragg reflector | Shigeyuki Akiba, Yukio Noda, Masatoshi Suzuki | 1989-01-03 |