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 51–52 of 52 patents

Patent #TitleCo-InventorsDate
5608717 Information recording media and optical disc presenting a character or a graphic pattern formed by specified pit patterns on data tracks Hiroshi Banno, Ryuichi Koike, Takashi Takeuchi 1997-03-04
5499221 CD-ROM retrieval apparatus Toshiyuki Oda, Takashi Takeuchi, Shiyouichirou Funato 1996-03-12