Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684785 | Optical disk and method of preventing fraudulent use of optical disk rotation synchronous control system | Satoshi Itami, Kenichi Utsumi, Kazuo Nakashima, Kazunori Naito | 1997-11-04 |
| 5357431 | Character string retrieval system using index and unit for making the index | Masahiro Nakada, Kenichi Utsumi, Takashi Tsubokura, Masaru Nakahara, Satoshi Itami +2 more | 1994-10-18 |