Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855250 | Method of manufacturing a semiconductor laser with autodoping control | Yasuhiko Tsuburai | 1989-08-08 |
| 4835117 | Manufacturing method for semiconductor laser with mesa stripe | Yasuo Ohba, Masayuki Ishikawa, Yukio Watanabe, Hideto Sugawara | 1989-05-30 |
| 4809287 | Double-heterostructure semiconductor with mesa stripe waveguide | Yasuo Ohba, Miyoko Watanabe, Hideto Sugawara, Masayuki Ishikawa, Yukio Watanabe | 1989-02-28 |
| 4799228 | Transverse-mode stabilized semiconductor laser diode with slab-coupled waveguide | Hiroko Nagasaka, Gen-ichi Hatakoshi, Naohiro Shimada, Masaki Okajima, Yoshio Iizuka +3 more | 1989-01-17 |