Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6832193 | Sound special reproducing method and information reproducing apparatus | — | 2004-12-14 |
| 6414864 | Circuit for reducing standby power of electric apparatus | — | 2002-07-02 |
| 6110584 | Magnetic recording medium | Ryoichi Hiratsuka, Yuka Ito | 2000-08-29 |
| 4801639 | Flame-retardant olefinic resin composition | Yasuo Nakagawa | 1989-01-31 |
| 4732939 | Flame-retardant olefinic resin compositions | Yasuo Nakagawa | 1988-03-22 |