Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873441 | Method of and apparatus for recording and reading out radiation image information | Tsutomu Kimura | 1989-10-10 |
| 4835117 | Manufacturing method for semiconductor laser with mesa stripe | Yasuo Ohba, Masayuki Ishikawa, Motoyuki Yamamoto, Hideto Sugawara | 1989-05-30 |
| 4825141 | DC power supply device | — | 1989-04-25 |
| 4809287 | Double-heterostructure semiconductor with mesa stripe waveguide | Yasuo Ohba, Miyoko Watanabe, Hideto Sugawara, Masayuki Ishikawa, Motoyuki Yamamoto | 1989-02-28 |