Issued Patents All Time
Showing 26–50 of 89 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6975730 | Method and apparatus for contents information | Toshio Kuroiwa, Takayuki Sugahara, Wataru Inoha, Kenjiro Ueda | 2005-12-13 |
| 6959087 | Method and apparatus for transmitting encryption-resultant information and decrypting information | — | 2005-10-25 |
| 6947663 | Method and apparatus for transmitting information, and reproducing apparatus, receiving apparatus and recording medium for the information, and transmission data thereof | Kazuo Koda, Takayuki Sugahara | 2005-09-20 |
| 6891951 | Cryptosystem-related method and apparatus | Wataru Inoha, Takayuki Sugahara, Toshio Kuroiwa, Kenjiro Ueda | 2005-05-10 |
| 6889323 | Method and apparatus for contents information | Takayuki Sugahara, Toshio Kuroiwa, Wataru Inoha, Kenjiro Ueda | 2005-05-03 |
| 6886097 | Method and apparatus for recording and reproducing information on and from recording medium | — | 2005-04-26 |
| 6879772 | Audio and video signal recording apparatus and method having a function of informing user when the signal is protected from recording | — | 2005-04-12 |
| 6834349 | Copyright protection system for data storage and transmission | Takayuki Sugahara | 2004-12-21 |
| 6735375 | Data recording and reproducing apparatus | Jin Ogasawara | 2004-05-11 |
| 6582309 | Game system and computer-readable recording medium | Kiyoshi Mizuki, Shintaro Mukai, Masato Akiyama, Hiroshi Takeyasu, Ryo Komatsu +1 more | 2003-06-24 |
| 6560401 | Method and apparatus for recording and reproducing information | Yasuaki Yamada | 2003-05-06 |
| 6525776 | Information compressing apparatus and method | — | 2003-02-25 |
| 6504991 | Magnetic recording apparatus, magnetic reproducing apparatus, and related methods | Yoichi Zenno | 2003-01-07 |
| 6459848 | Magnetic recording apparatus and method, and magnetic recording medium | — | 2002-10-01 |
| 6381281 | Information compressing apparatus | — | 2002-04-30 |
| 6334024 | Helical scan data recording apparatus and a helical scan data reproducing apparatus | Takeo Ohishi, Mitsuo Harumatsu | 2001-12-25 |
| 6317557 | Digital signal recording method and apparatus and recording medium therefor | Takeo Ohishi, Mitsuo Harumatsu | 2001-11-13 |
| 6288857 | Digital signal recording apparatus, and related method | Yoichi Zenno, Takeo Ohishi | 2001-09-11 |
| 6262771 | Method and apparatus for converting picture signal, and recording and reproducing apparatus | Takayuki Sugahara | 2001-07-17 |
| 6201926 | Apparatus for recording digital picture signal | Yumi Yoshida, Yasuhiko Teranishi | 2001-03-13 |
| 6198585 | Digital signal recording apparatus, and related method | Yoichi Zenno, Takeo Ohishi | 2001-03-06 |
| 6191900 | Digital signal recording and reproducing apparatus and recording medium | Yoichi Zenno | 2001-02-20 |
| 6137648 | Magnetic tape and a method for recording and reproducing a plurality of different information signals on and from the magnetic tape | — | 2000-10-24 |
| 6125233 | Method of recording one of different data | — | 2000-09-26 |
| 6122432 | Information signal recording apparatus | Yoichi Zenno | 2000-09-19 |