Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5058120 | Visible light emitting semiconductor laser with inverse mesa-shaped groove section | Koichi Nitta, Yukio Watanabe, Yukie Nishikawa, Masaki Okajima | 1991-10-15 |
| 5036521 | Semiconductor laser device | Kazuhiko Itaya, Shigeya Naritsuka, Masayuki Ishikawa, Hajime OKUDA, Hideo Shiozawa +4 more | 1991-07-30 |
| 5023880 | Semiconductor laser device | Mariko Suzuki, Kazuhiko Itaya, Masayuki Ishikawa, Yukio Watanabe | 1991-06-11 |
| 4987096 | Manufacturing method of semiconductor laser with non-absorbing mirror structure | Masayuki Ishikawa, Hajime OKUDA, Hideo Shiozawa, Kazuhiko Itaya, Yukio Watanabe +1 more | 1991-01-22 |
| 4893313 | Semiconductor laser device which has a double-hetero structure having an optimal layer thickness | Kazuhiko Itaya, Shigeya Naritsuka, Masayuki Ishikawa, Hajime OKUDA, Hideo Shiozawa +4 more | 1990-01-09 |