Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6506531 | Magnetic carrier | Toshiyuki Hakata, Hiroomi Kakihara, Kenji Okada, Yushi Mikuriya, Kazumi Yoshizaki | 2003-01-14 |
| 5654120 | Magnetic carrier for electrophotography | Toshiyuki Hakata, Hiroomi Kakihara | 1997-08-05 |
| 5368933 | Superparamagnetic fine particles of iron oxide and magnetic recording media containing said particles | Koso Aoki, Tomoyuki Imai, Nanao Horiishi, Kazuyuki Hayashi | 1994-11-29 |
| 5236783 | Superparamagnetic fine particles of iron oxide and magnetic recording media containing said particles | Koso Aoki, Tomoyuki Imai, Nanao Horiishi, Kazuyuki Hayashi | 1993-08-17 |