Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5615184 | Disc playing device | Yukiyasu Tsuruta, Akihiro Yoshioka | 1997-03-25 |
| 5237555 | Disc player | Yukiyasu Tsuruta | 1993-08-17 |
| 4796244 | Disc player | Yukiyasu Tsuruta, Saburo Yorizane, Koichiro Kimura, Taizo Isshiki, Masanori Okada +1 more | 1989-01-03 |