Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
TI

Tamotsu Ito — 52 Patents

Hitachi: 40 patents #499 of 28,497Top 2%
MAMaxell: 7 patents #88 of 437Top 25%
Kabushiki Kaisha Toshiba: 2 patents #9,982 of 21,451Top 50%
HMHitachi Maxell: 2 patents #441 of 1,211Top 40%
TSToshiba Electronic Devices & Storage: 1 patents #470 of 900Top 55%
HCHitachi Ulsi Systems Co.: 1 patents #577 of 867Top 70%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
CCCasio Hitachi Mobile Communications Co.: 1 patents #35 of 109Top 35%
Overall (All Time): #50,154 of 4,157,543Top 2%
52 Patents All Time

Issued Patents All Time

Showing 26–50 of 52 patents

Patent #TitleCo-InventorsDate
7031597 Method for recording still picture group management information Akira Date, Masahiro Kageyama 2006-04-18
6832040 Reproducing apparatus and reproducing/recording apparatus memorizing identification information of optical information media and method thereof Yukari Sakuramoto 2004-12-14
6816444 Method and apparatus for digital information processing Hiroyuki Hayakawa, Atsuhiro Ohno, Akira Okushi 2004-11-09
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 Tsukasa Hasegawa, Atsushi Saito, Shigemitsu Higuchi 2004-09-07
6701063 Video disc recording and reproducing apparatus, and method using the same Osamu Komoda, Masahiro Kageyama 2004-03-02
6697563 Information recording medium, motion-picture voice recording/reproducing apparatus, and motion-picture voice recording/reproducing method Osamu Komoda, Tsukasa Hasegawa, Masahiro Kageyama, Shinichiro Fukushima 2004-02-24
6633724 Realtime data recording method Tsukasa Hasegawa, Masahiro Kageyama 2003-10-14
6631107 Method and apparatus for information recording medium Toshihiro Kato, Susumu Yoshida, Kensei Hayakawa, Akira Okushi 2003-10-07
6594442 Optical disk recording still image data, a method and apparatus for recording and playing back still image data to and from the optical disk Masahiro Kageyama, Akira Date, Kaoru Murase, Tomoyuki Okada 2003-07-15
6496978 Microcomputer control system in which programs can be modified from outside of the system and newer versions of the modified programs are determined and executed 2002-12-17
6493504 Storage medium, recording apparatus, playback apparatus, recording method, and computer-readable storage medium Akira Date, Masahiro Kageyama 2002-12-10
6483983 Information reproducing method, information reproducing apparatus and information recording/reproducing apparatus Yuzuru Takahashi 2002-11-19
6467005 System for connecting drive unit for host apparatus Yukari Sakuramoto, Eiji Ikeda 2002-10-15
6463022 Information recording medium, enclosing casing of information recording medium, and information recording apparatus using the same Tsukasa Hasegawa, Atsushi Saito, Shigemitsu Higuchi 2002-10-08
6445654 Recording/reproducing method and device with supplementary data storage and output Hiroyuki Hayakawa, Keiji Nagayama, Susumu Yoshida, Akinobu Watanabe, Katsuhiko Tonami 2002-09-03
6393201 Reproducing apparatus and reproducing/recording apparatus memorizing identification information of optical information meda and method thereof Yukari Sakuramoto 2002-05-21
6347068 Information recording medium, enclosing casing of information recording medium, and information recording apparatus using the same Tsukasa Hasegawa, Atsushi Saito, Shigemitsu Higuchi 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 Tsukasa Hasegawa, Atsushi Saito, Shigemitsu Higuchi 2001-06-05
6229777 Information recording medium, apparatus and control method therefor Tatsuya Ishitobi, Hiroaki Ono, Shigemitsu Higuchi 2001-05-08
6088825 Error correcting apparatus with error correction unit carrying out first error correction and CPU configured to carry out second error correction Makoto Ikushima, Shinji Otsuka, Hirofumi Tsujimura 2000-07-11
5875156 Playback system for an optical disc representing a character or a graphic pattern formed by specified pit patterns Hiroshi Banno, Ryuichi Koike, Takashi Takeuchi 1999-02-23
5808987 Information reproducing system for reproducing interleaved image data and voice data from a recording medium in accordance with a control program reproducing from the recording medium Toshiyuki Oda, Takashi Takeuchi 1998-09-15
5768502 Error correcting apparatus for detecting and correcting errors in data accessed from a storage medium Makoto Ikushima, Shinji Otsuka, Hirofumi Tsujimura 1998-06-16
5751671 Information recording media and optical disk, disk having specific data so that a visible pattern of characters or graphics appear on a copy disk Ryuichi Koike, Hiroshi Banno, Takashi Takeuchi 1998-05-12
5737306 Playback system for an optical disc presenting a character or a graphic pattern formed by specified pit patterns on data tracks Hiroshi Banno, Ryuichi Koike, Takashi Takeuchi 1998-04-07