Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835117 | Manufacturing method for semiconductor laser with mesa stripe | Yasuo Ohba, Masayuki Ishikawa, Motoyuki Yamamoto, Yukio Watanabe | 1989-05-30 |
| 4809287 | Double-heterostructure semiconductor with mesa stripe waveguide | Yasuo Ohba, Miyoko Watanabe, Masayuki Ishikawa, Yukio Watanabe, Motoyuki Yamamoto | 1989-02-28 |