Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7619962 | Optical disc and method of producing the same | Takashi Ohgo, Takayuki Onizawa, Naoyuki Nakagawa, Kenji Oishi | 2009-11-17 |
| 7567499 | Optical disc and method of producing the same | Takayuki Onizawa, Naoyuki Nakagawa, Kenji Oishi, Takashi Ohgo | 2009-07-28 |
| 4863795 | Magnetic recording medium | Yoshiaki Sato, Junichi Ito | 1989-09-05 |