Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5376511 | Optical recording medium | Fumio Tatezono, Masahiro Irie, Toshio Harada | 1994-12-27 |
| 5316900 | Optical recording medium having a constant birefringent property and an alterable photochromic property | Tsuyoshi Tsujioka, Fumio Tatezono, Masahiro Irie | 1994-05-31 |
| 5281501 | Method of recording and reproducing for optical recording medium | Fumio Tatezono, Irie Masahiro, Toshio Tanuma, Toshio Harada | 1994-01-25 |
| 5173370 | Magnetic recording medium having a magnetic thin film with both paramagnetic phase and ferromagnetic phase iron nitride with paramagnetic phase zeta Fe.sub.2 N as its largest component | Seiichiro Takahashi, Minoru Kume | 1992-12-22 |