Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841531 | Semiconductor laser device | Masahiko Kondow, Shigekazu Minagawa, Akio Ohishi, Takashi Kajimura | 1989-06-20 |
| 4829249 | Method of inspecting magnetic disks for surface defects | Toshihiro Matsushita | 1989-05-09 |