Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5057373 | Magnetic recording medium | Jun Nakagawa, Tsutomu Okita, Toshio Kawamata | 1991-10-15 |
| 4970121 | Magnetic recording medium | Jun Nakagawa, Tsutomu Okita, Toshio Kawamata, Kazuo Hasumi | 1990-11-13 |
| 4678706 | Magnetic recording medium | Takamitsu Asai, Masaaki Fujiyama | 1987-07-07 |
| 4656088 | Magnetic recording medium | Takamitsu Asai, Masaaki Fujiyama | 1987-04-07 |
| 4542085 | Negative working diazo light-sensitive composition with oxonol dye and lithographic printing plate using the same | Hiroshi Takahashi, Akira Nishioka, Yoshimasa Aotani, Koichiro Aono | 1985-09-17 |