Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4980875 | Magneto-optical disk with perpendicular magnetic anisotropy film and high corrosion-resistant film | Nobuyuki Ishiwata, Chizuko Wakabayashi, Takayuki Matsumoto, Toshiyuki Okumura, Susumu Ito | 1990-12-25 |