Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4731777 | Optical disk player | You Yoshitoshi, Tsutomu Toyoguchi, Ryoji Takamatsu | 1988-03-15 |
| 4592039 | Disc player | Tsutomu Toyoguchi | 1986-05-27 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4731777 | Optical disk player | You Yoshitoshi, Tsutomu Toyoguchi, Ryoji Takamatsu | 1988-03-15 |
| 4592039 | Disc player | Tsutomu Toyoguchi | 1986-05-27 |