Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8406311 | System and method for embedding additional information in video data | Koichi Kamijo, Shuichi Shimizu | 2013-03-26 |
| 8055505 | Audio content digital watermark detection | Ryuki Tachibana | 2011-11-08 |
| 7748051 | Contents server, contents receiving apparatus and network system for adding information to digital contents | Kohichi Kamijoh, Seiji Kobayashi, Masato Kurokawa | 2010-06-29 |
| 7469422 | Contents server, contents receiving method for adding information to digital contents | Kohichi Kamijoh, Seiji Kobayashi, Masato Kurokawa | 2008-12-23 |
| 7295615 | System for embedding additional information in video data, and embedding method | Koichi Kamijo, Shuichi Shimizu | 2007-11-13 |
| 7093299 | System for authenticating digital data | Koichi Kamijo, Akio Koide, Tohru Sakakura | 2006-08-15 |
| 6963655 | Alteration detection apparatus and method thereof | Satoko Tonegawa, Kohichi Kamijoh | 2005-11-08 |
| 6829367 | Content data judging apparatus | Kazuhara Toyokawa, Satoko Tonegawa | 2004-12-07 |
| 6782509 | Method and system for embedding information in document | Yuki HIRAYAMA, Tomio Amano, Shuichi Shimizu | 2004-08-24 |
| 6526385 | System for embedding additional information in audio data | Seiji Kobayashi, Dean Chen, Yoshiaki Ohshima, Shuichi Shimizu | 2003-02-25 |
| 6512835 | Data hiding and extraction methods | Masayuki Numao, Shuichi Shimizu, Mei Kobayashi | 2003-01-28 |
| 6351439 | Method and system for managing access to data through data transformation | Kunihiko Miwa, Hiroya Kobayashi | 2002-02-26 |
| 6286100 | Method for hiding message data into media data and a method for extracting that hidden data | Shu Tezuka, Syoiti Ninomiya | 2001-09-04 |
| 6249870 | Data hiding method and data extraction method using statistical examination | Seiji Kobayashi, Akio Koide, Shuichi Shimizu | 2001-06-19 |
| 6230268 | Data control system | Kunihiko Miwa, Shuichi Shimizu | 2001-05-08 |
| 6201879 | Method and apparatus for logo hiding in images | Walter Bender, Daniel Gruhl | 2001-03-13 |
| 6055321 | System and method for hiding and extracting message data in multimedia data | Masayuki Numao, Shuichi Shimizu, Mei Kobayashi | 2000-04-25 |
| 6034931 | Method of recording media data on a storage medium and method and system for accessing the media data recorded on the storage medium | Kunihiko Miwa, Hiroya Kobayashi | 2000-03-07 |
| 6005643 | Data hiding and extraction methods | Junji Maeda | 1999-12-21 |
| 6005936 | System for embedding authentication information into an image and an image alteration detecting system | Shuichi Shimizu, Masayuki Numao | 1999-12-21 |
| 5893067 | Method and apparatus for echo data hiding in audio signals | Walter Bender, Daniel Gruhl | 1999-04-06 |
| 5870499 | Method and apparatus for data hiding in images | Walter Bender, Daniel Gruhl | 1999-02-09 |
| 5689587 | Method and apparatus for data hiding in images | Walter Bender, Daniel Gruhl | 1997-11-18 |
| 5132891 | Power supply apparatus | Masaki Kobayashi, Masaki Mori | 1992-07-21 |