Issued Patents All Time
Showing 76–82 of 82 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4553239 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1985-11-12 |
| 4516243 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai | 1985-05-07 |
| 4506367 | Distributed feedback semiconductor laser | Kazuo Sakai, Katsuyuki Utaka, Yuichi Matsushima | 1985-03-19 |
| 4456998 | Semiconductor laser | Fujio Tanaka, Yasuyuki Okamura, Yukitoshi Kushiro, Chuichi Ota | 1984-06-26 |
| 4383266 | Avalanche photo diode | Kazuo Sakai, Yuichi Matsushima, Takaya Yamamoto | 1983-05-10 |
| 4340966 | Semiconductor laser with buffer layer | Yasuharu Suematsu, Shigehisa Arai, Masanobu Kodaira, Yoshio Itaya, Kenichi Iga +3 more | 1982-07-20 |
| 4274103 | Avalanche photodiode with semiconductor hetero structure | Takaya Yamamoto, Kazuo Sakai | 1981-06-16 |