Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6010761 | Optical disc | Hiromasa Kato, Kenichi Obinata, Masahiro Aoki | 2000-01-04 |
| 5800864 | Optical disc | Hiromasa Kato, Kenichi Obinata, Masahiro Aoki | 1998-09-01 |
| 5186994 | Optical disc | Hiromasa Kato, Kenichi Obinata, Masahiro Aoki | 1993-02-16 |