Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6008940 | Protective film of polarizing plate | Isamu Michihata, Koichi Nagayasu, Toru Kobayashi | 1999-12-28 |
| 5914073 | Protective film for polarizing plate | Toru Kobayashi, Naoko Morita, Koichi Nagayasu, Isamu Michihata | 1999-06-22 |
| 4684572 | Magnetic recording medium | Yoshitaka Yasufuku, Shigeru Akutsu | 1987-08-04 |
| 4652496 | Magnetic recording medium | Yoshitaka Yasufuku, Shigeru Akutsu | 1987-03-24 |