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USPTO Patent Rankings Data through Dec 31, 2025
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Hitoshi Ishikawa — 112 Patents

Nec: 34 patents #190 of 14,502Top 2%
Samsung: 18 patents #7,545 of 75,807Top 10%
Sony: 17 patents #2,471 of 25,231Top 10%
Aisin Seiki Kabushiki Kaisha: 14 patents #194 of 3,782Top 6%
Hitachi: 10 patents #4,209 of 28,497Top 15%
NDNec Energy Devices: 9 patents #3 of 81Top 4%
HCHitachi Car Engineering Co.: 8 patents #53 of 465Top 15%
NTNt Tool: 4 patents #1 of 7Top 15%
Fujitsu Limited: 2 patents #10,930 of 24,456Top 45%
OLOlympus: 2 patents #1,626 of 3,097Top 55%
TKTerumo Kabushiki Kaisha: 2 patents #599 of 1,558Top 40%
Denso: 2 patents #4,986 of 11,792Top 45%
Mitsubishi Electric: 1 patents #15,491 of 25,717Top 65%
TSTogo Seisakusyo: 1 patents #25 of 66Top 40%
MSMitsubishi Hitachi Power Systems: 1 patents #495 of 970Top 55%
DCDmg Mori Co.: 1 patents #91 of 217Top 45%
ADAtotech Deutschland: 1 patents #212 of 445Top 50%
Overall (All Time): #11,519 of 4,157,543Top 1%
112 Patents All Time
Hitoshi Ishikawa has been granted 112 US patents while listed as an inventor at Nec. The first was granted in 1984 and the most recent in July 2025. Hitoshi Ishikawa ranks #11,519 of 4,157,543 US inventors in our database (top 0.28%). Patent records list Hitoshi Ishikawa in Takahama, MH, JP.

Issued Patents All Time

Showing 1–25 of 112 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12343835 Cooling medium spray device Hiroyuki Suzuki 2025-07-01
12158169 Clamping device Yusuke Moriya 2024-12-03
11495800 Electrode for power storage device and method for producing same Suguru TAMAI 2022-11-08
11251424 Lithium ion secondary battery Suguru TAMAI 2022-02-15
11154937 Tool holder — 2021-10-26
10978737 Nonaqueous electrolyte solution and secondary battery Noboru YOSHIDA, Ikiko Shimanuki, Shinsaku Saitho 2021-04-13
10840551 Lithium secondary battery and manufacturing method therefor Ikiko Shimanuki, Noboru YOSHIDA, Daisuke Kawasaki 2020-11-17
10824775 Simulation method and device for determining collision between objects Hiroshi Matsuike, Koichi Yoshida 2020-11-03 $1,466,000
10756337 Lithium ion secondary battery Ikiko Shimanuki, Suguru TAMAI, Daisuke Kawasaki 2020-08-25
10711652 Steam turbine plant Yusuke Manabe 2020-07-14
10566661 Electrolytic solution and secondary battery Ikiko Shimanuki, Noboru YOSHIDA 2020-02-18
10361464 Electrolytic solution and secondary battery Noboru YOSHIDA, Ikiko Shimanuki, Shinsaku Saitho 2019-07-23
10224568 Electrolytic solution and secondary battery Noboru YOSHIDA, Shinsaku Saitho, Kazuaki Matsumoto, Ikiko Shimanuki, Daisuke Kawasaki +1 more 2019-03-05
10211451 Negative electrode for lithium ion secondary battery comprising negative electrode active material containing two carbons and method for manufacturing lithium ion secondary battery comprising same Takeshi Azami 2019-02-19
10089420 Simulation apparatus, controlling method, program and information storage medium for the simulation apparatus Hiroshi Matsuike, Koichi Yoshida 2018-10-02 $1,026,000
9991561 Lithium ion secondary battery Takeshi Azami, Noboru YOSHIDA, Ikiko Shimanuki, Kazuaki Matsumoto, Makihiro Otohata 2018-06-05
9988730 Method of forming a metal layer and method of manufacturing a substrate having such metal layer Tadahiro Nishigawa, Jun Higuchi 2018-06-05
9953116 Methods and apparatus for simulating positions of a plurality of objects in a virtual space, controlling method, program and information storage medium Hiroshi Matsuike, Koichi Yoshida 2018-04-24 $614,000
9941545 Electrolyte solution for secondary batteries, and secondary battery using same Ikiko Shimanuki, Daisuke Kawasaki 2018-04-10
9899703 Gel electrolyte and polymer secondary battery using same Noboru YOSHIDA, Ikiko Shimanuki, Shinako Kaneko 2018-02-20
9887904 Information processing apparatus, control method, and program — 2018-02-06 $894,000
9871272 Secondary battery Shinsaku Saitho, Kazuhiko Inoue 2018-01-16
9847180 Nonaqueous electrolyte solution, and lithium ion secondary battery having the same Shinako Kaneko, Yoko Hashizume, Eiji Suzuki 2017-12-19
9620812 Lithium ion battery Shinako Kaneko 2017-04-11
9583789 Non-aqueous electrolyte secondary battery Akinobu Nakamura, Koji Utsugi 2017-02-28

Nearby-Ranked Inventors

Armand Rene Gabriel Leconte112
Lawrence J. Smith112
Samuel James McKelvie112
Wataru Fukui112
Keiji Mihayashi112
Rajiv Asati112
Michael Richter112
Wenbin Jiang112
Serge Francois Drogi112