Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684785 | Optical disk and method of preventing fraudulent use of optical disk rotation synchronous control system | Satoshi Itami, Kazuo Nakashima, Kazunori Naito, Satoshi Komura | 1997-11-04 |
| 5654838 | Library apparatus having recording medium entry and ejection units | Nobuhiko Motoyama | 1997-08-05 |
| 5623548 | Transformation pattern generating device and encryption function device | Ryota Akiyama, Naoya Torii, Noboru Iwayama | 1997-04-22 |
| 5617393 | Optical disk having an erased-state indicator and optical disk apparatus for reducing frequency of disk erasing operation | Satoshi Itami, Masaru Nakahara, Masahiro Nakada, Hiroshi Suzuki | 1997-04-01 |