Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7698571 | Digital work protection system, record/playback device, recording medium device, and model change device | Shunji Harada, Masaya Miyazaki, Shinichi Matsui, Shinji Inoue, Natsume Matsuzaki | 2010-04-13 |
| 7694155 | Digital work protection system, record/playback device, recording medium device, and model change device | Shunji Harada, Masaya Miyazaki, Shinichi Matsui, Shinji Inoue, Natsume Matsuzaki | 2010-04-06 |
| 7487547 | Content processing apparatus and content protection program | Shinichi Nakai, Shinichi Matsui, Taihei Yagawa, Shunji Harada, Ryuji Inoue | 2009-02-03 |
| 7472427 | Content management method and content management apparatus | Takashi Shimojima, Mitsuhiro Sato, Shinichi Matsui, Ryuji Inoue, Kaoru Murase +1 more | 2008-12-30 |
| 7269741 | Recording apparatus, medium, method, and related computer program | Shinichi Matsui, Mitsuhiro Sato, Takashi Shimojima, Kiichi Hasegawa, Norio Nakamura +1 more | 2007-09-11 |
| 7003533 | File management method, content recording/playback apparatus and content recording program | Hiroyuki Suzuki, Mitsuhiro Sato, Takashi Shimojima | 2006-02-21 |
| 6922707 | File management method and content recording/playback apparatus | Takashi Shimojima, Hiroyuki Suzuki, Mitsuhiro Sato | 2005-07-26 |
| 6622122 | Document retrieving apparatus and document retrieving method | Yoshio Fukushige, Hiroyuki Suzuki, Hayashi Ito, Mitsuhiro Sato, Masaki Kiyono +1 more | 2003-09-16 |
| 6298344 | Document searching apparatus | Mitsuaki Inaba, Yuji Kanno, Mitsuhiro Sato, Hayashi Ito | 2001-10-02 |
| 6212517 | Keyword extracting system and text retrieval system using the same | Mitsuhiro Sato, Yuji Kanno, Masako Nomoto, Mitsuaki Inaba, Yoshio Fukushige | 2001-04-03 |
| 6154737 | Document retrieval system | Mitsuaki Inaba, Hideki Yasukawa, Yuji Kanno, Mitsuhiro Sato, Masako Nomoto | 2000-11-28 |
| 5991755 | Document retrieval system for retrieving a necessary document | Masako Nomoto | 1999-11-23 |
| 5706496 | Full-text search apparatus utilizing two-stage index file to achieve high speed and reliability of searching a text which is a continuous sequence of characters | Yuji Kanno, Kazuaki Kurachi, Mitsuaki Inaba | 1998-01-06 |