Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837118 | Magneto-optical recording medium | Masaaki Nomura, Takashi Yamada, Akira Nahara | 1989-06-06 |
| 4808456 | Magneto-optical recording medium and method of making the same | Takashi Yamada, Masaaki Nomura, Akira Nahara | 1989-02-28 |
| 4802160 | Optical disk substrate | Takashi Yamada, Masaaki Nomura, Akira Nahara | 1989-01-31 |