Issued Patents All Time
Showing 25 most recent of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8180197 | Method and apparatus for recording/reproducing digital video signal or audio signal, and optical disk apparatus | Yutaka Nagai, Toshifumi Takeuchi | 2012-05-15 |
| 7174092 | Method and apparatus for recording/reproducing digital video signal or audio signal, and optical disk apparatus | Yutaka Nagai, Toshifumi Takeuchi | 2007-02-06 |
| 6788346 | Camera information recording apparatus for recording image data in an optical disk wherein managing information is stored when the residual storage of a battery decreases | Tamotsu Ito, Tsukasa Hasegawa, Atsushi Saito | 2004-09-07 |
| 6754442 | Method and apparatus for recording/reproducing digital video signal or audio signal, and optical disk apparatus | Yutaka Nagai, Toshifumi Takeuchi | 2004-06-22 |
| 6680897 | Optical disk and recording/reproduction apparatus using the same | Hiroaki Ono, Kenji Sano | 2004-01-20 |
| 6657666 | Method and apparatus for recording image information | Seiji Imagawa, Hiroaki Ono, Isao Nakagawa | 2003-12-02 |
| 6501718 | Disk, recording and reproduction apparatus, and recording and reproduction method | Hiroaki Ono | 2002-12-31 |
| 6463022 | Information recording medium, enclosing casing of information recording medium, and information recording apparatus using the same | Tamotsu Ito, Tsukasa Hasegawa, Atsushi Saito | 2002-10-08 |
| 6373799 | Optical disk and recording/reproduction apparatus using the same | Hiroaki Ono, Kenji Sano | 2002-04-16 |
| 6359842 | Disc having a semiconductor memory | Hirofumi Taguchi | 2002-03-19 |
| 6347068 | Information recording medium, enclosing casing of information recording medium, and information recording apparatus using the same | Tamotsu Ito, Tsukasa Hasegawa, Atsushi Saito | 2002-02-12 |
| 6243340 | Information recording apparatus including system control means for producing managing information for managing data recorded on an information recording medium and preventing designated data from being accessed | Tamotsu Ito, Tsukasa Hasegawa, Atsushi Saito | 2001-06-05 |
| 6229777 | Information recording medium, apparatus and control method therefor | Tatsuya Ishitobi, Hiroaki Ono, Tamotsu Ito | 2001-05-08 |
| 5936791 | Helical scan data recording and playback method and apparatus wherein reference helical tracks preceding data recording area on magnetic tape are played back before recording or playback of target data | Toshiro Aizawa | 1999-08-10 |
| 5808824 | Tape feed control system | Kouji Kaniwa, Kouji Fujita, Nobuyuki Kaku | 1998-09-15 |
| 5739976 | Magnetic recording and reproducing apparatus | Kazuo Sakai, Fumio Takeda, Taichiro Yamashita, Fujio Tajima, Takao Terayama +8 more | 1998-04-14 |
| 5737146 | Data recording and playback apparatus using a helical scan system with magnetic head for recording and playing back pattern signal for tracking in tracking area within helical track | Toshiro Aizawa | 1998-04-07 |
| 5636316 | Picture signal digital processing unit | Masuo Oku, Yukio Fujii, Masaru Takahashi, Kenji Ichige, Keizo Nishimura +2 more | 1997-06-03 |
| 5617535 | Recording and playbackk apparatus | Toshiro Aizawa, Hiromasa Fujii | 1997-04-01 |
| 5521769 | Magnetic tape drive with displaceable head capable of a re-try operation | Atsuo Suga, Kouji Fujita, Toshiro Aizawa, Minoru Kosuge | 1996-05-28 |
| 5500775 | Data recording and reproducing apparatus | Kouji Fujita, Toshiro Aizawa, Atsuo Suga, Minoru Kosuge | 1996-03-19 |
| 5495371 | Magnetic tape library device and method for maintaining magnetic recording and reproducing device and magnetic head | Takayuki Munemoto, Kazuo Sakai, Fujio Tajima, Tomokazu Ishii, Fumio Takeda +4 more | 1996-02-27 |
| 5488520 | Data recording and playback apparatus using helical scan system with magnetic head for recording and playing back pattern signal for tracking in tracking area within helical track | Toshiro Aizawa | 1996-01-30 |
| 5471352 | Recording/playback apparatus in which head and tape are held in intermittent contact during rapid search | Kouji Fujita | 1995-11-28 |
| 5438459 | Method of processing and recording data while reproducing the same and apparatus for the method | Atsuo Suga, Hideo Nishijima, Hiromasa Fujii | 1995-08-01 |