Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5000982 | Magnetic recording medium and method for producing the same | Heigo Ishihara, Akira Osaki, Waichi Nagashiro | 1991-03-19 |
| 4985295 | Magnetic recording medium and method for producing the same | Heigo Ishihara, Akira Osaki, Waichi Nagashiro | 1991-01-15 |
| 4721646 | Magnetic recording medium | Keigo Iechika, Masa-aki Imamura, Yoshiki Kato, Eiichi Takasuna, Youichi Kawakubo | 1988-01-26 |