Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5841757 | Optical disk having a large storage capacity | Hideharu Takeshima, Hidemi Yoshida | 1998-11-24 |
| 5481530 | High density optical recording method and recording medium | Hidemi Yoshida, Masaaki Mizuno | 1996-01-02 |