Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809287 | Double-heterostructure semiconductor with mesa stripe waveguide | Yasuo Ohba, Hideto Sugawara, Masayuki Ishikawa, Yukio Watanabe, Motoyuki Yamamoto | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809287 | Double-heterostructure semiconductor with mesa stripe waveguide | Yasuo Ohba, Hideto Sugawara, Masayuki Ishikawa, Yukio Watanabe, Motoyuki Yamamoto | 1989-02-28 |