Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6983059 | Digital watermark detecting device and method thereof | — | 2006-01-03 |
| 6952486 | Digital watermark embedding method and apparatus, and digital watermark | Tomoo Yamakage, Hisashi Yamada, Toru Kambayashi, Shinichiro Koto | 2005-10-04 |
| 6901515 | Code generating method and unit thereof, code detecting method and unit thereof, and watermark embedding unit and watermark detecting unit | — | 2005-05-31 |
| 6804375 | Electronic watermark detection apparatus and method | — | 2004-10-12 |
| 6768807 | Digital watermark embedding device, digital watermark detection device, digital information distribution device, and, storage medium | — | 2004-07-27 |
| 6757405 | Digital watermark embedding device, digital watermark detection device and recording medium recording computer readable program for realizing functions of two devices | Taku Katoh, Naoki Endo | 2004-06-29 |
| 6741723 | Digital watermark embedding method and apparatus, and digital watermark | Tomoo Yamakage, Hisashi Yamada, Toru Kambayashi, Shinichiro Koto | 2004-05-25 |
| 6163799 | Communication navigation system which easily finds person who is interested in the same topic | Toru Kambayashi, Ichiro Tomoda, Yasuhiko Shimomura, Takashi Ida, Toshiya Takahashi +5 more | 2000-12-19 |
| 6119109 | Information distribution system and billing system used for the information distribution system | Tomohisa Hamakawa | 2000-09-12 |
| 6061451 | Apparatus and method for receiving and decrypting encrypted data and protecting decrypted data from illegal use | Akihiro Muto | 2000-05-09 |
| 5968175 | Software use method control system | Akira Morishita, Miwako Doi, Seiji Miike | 1999-10-19 |
| 5832229 | Multicast communication system allows user to join or leave multicast groups and specify communication quality using easily comprehensible and operable user terminal display | Ichiro Tomoda, Toru Kambayashi, Satoshi Ito, Takashi Ida, Yasuhiko Shimomura +2 more | 1998-11-03 |
| 5572710 | High speed logic simulation system using time division emulation suitable for large scale logic circuits | Shigehiro Asano, Shouzou Isobe, Jiro Amemiya | 1996-11-05 |