Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4463388 | Rotary recording medium capable of performing special reproduction | Hiroyuki Sugiyama, Ryozo Abe, Masaki Sakurai, Kenji Yoshihara | 1984-07-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4463388 | Rotary recording medium capable of performing special reproduction | Hiroyuki Sugiyama, Ryozo Abe, Masaki Sakurai, Kenji Yoshihara | 1984-07-31 |