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

Takuya Ishikawa — 32 Patents

IBM: 11 patents #9,995 of 70,183Top 15%
FCFurukawa Electric Co.: 5 patents #398 of 2,370Top 20%
Toyota: 5 patents #5,641 of 26,838Top 25%
FIFujifilm Business Innovation: 5 patents #693 of 1,659Top 45%
Denso: 1 patents #6,940 of 11,792Top 60%
Sony: 1 patents #17,262 of 25,231Top 70%
TLTokyo Electron Limited: 1 patents #3,538 of 5,567Top 65%
EREast Japan Railway: 1 patents #9 of 63Top 15%
NSNippon Soken: 1 patents #783 of 1,540Top 55%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
Overall (All Time): #111,370 of 4,157,543Top 3%
32 Patents All Time

Issued Patents All Time

Showing 26–32 of 32 patents

Patent #TitleCo-InventorsDate
6439417 Fuel tank and vehicle equipped with the same Tomoyasu Arase, Takashi Ishikawa, Teijiro Goto 2002-08-27
6382453 Fuel tank Katsuyuki Miura, Takashi Ishikawa, Teijiro Goto 2002-05-07
6278139 Semiconductor light-emitting diode Satoshi Arakawa, Toshikazu Mukaihara, Akihiko Kasukawa 2001-08-21
5953358 Semiconductor laser device Akihiko Kasukawa 1999-09-14
5821818 Phase locked loop ciruit for a liquid crystal display Seiichi Idei 1998-10-13
5757833 Semiconductor laser having a transparent light emitting section, and a process of producing the same Satoshi Arakawa, Norihiro Iwai, Akihiko Kasukawa, Michio Ohkubo, Takao Ninomiya 1998-05-26
5153687 Semiconductor optical functional device with parabolic wells Shinji Nishimura, Kunio Tada 1992-10-06