Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5796708 | Optical recording medium and recording system | Hideki Ohkawa, Motonari Matsubara, Tomohisa Yoshimaru, Nobuhisa Yoshida | 1998-08-18 |
| 4682321 | Optical recording medium | Takashi Takaoka, Tetsuo Saito | 1987-07-21 |