Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
HT

Hiroki Tomizawa — 32 Patents

Denso: 27 patents #220 of 11,792Top 2%
Toyota: 17 patents #1,497 of 26,838Top 6%
JTJtekt: 12 patents #104 of 1,969Top 6%
Kariya, JP: #184 of 4,822 inventorsTop 4%
Overall (All Time): #110,428 of 4,157,543Top 3%
32 Patents All Time
Hiroki Tomizawa has been granted 32 US patents while listed as an inventor at Denso. The first was granted in 2014 and the most recent in December 2025. Hiroki Tomizawa ranks #110,428 of 4,157,543 US inventors in our database (top 2.7%). Patent records list Hiroki Tomizawa in Kariya, JP.

Patents per Year

Patents granted per year, 2014 to 2025Bar chart with a peak of 11 patents in 2025.peak 112014: 1 patents20142016: 4 patents20162017: 1 patents20172018: 2 patents20182019: 3 patents20192020: 1 patents20202022: 1 patents20222024: 8 patents20242025: 11 patents2025

Issued Patents All Time

Showing 1–25 of 32 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12503155 Vehicle control device Kazuma Hasegawa, Yuuji Fujita, Yuuta KAJISAWA, Yugo NAGASHIMA, Takashi KOUDAI +8 more 2025-12-23
12466471 Vehicle power supply system and control method of vehicle power supply system Yuuta KAJISAWA, Yuuji Fujita, Yugo NAGASHIMA, Kazuma Hasegawa, Takashi KOUDAI +11 more 2025-11-11
12459560 Steer-by-wire steering system Takehiro Ishino, Masuo Yamashita, Kenji Shibata, Yoichiro Yamashita, Shigeki Takayama +8 more 2025-11-04
12454306 Vehicle control unit and vehicle control method Takashi KOUDAI, Yuuji Fujita, Kenichi Abe, Yugo NAGASHIMA, Kazuma Hasegawa +7 more 2025-10-28
12434724 Electric power source apparatus Yuuta KAJISAWA, Yuuji Fujita, Kazuma Hasegawa, Yugo NAGASHIMA, Takashi KOUDAI +11 more 2025-10-07
12344262 Vehicle control device Yugo NAGASHIMA, Yuji Fujita, Yuuta KAJISAWA, Kazuma Hasegawa, Takashi KOUDAI +9 more 2025-07-01
12330716 Steering control device Kaishi MONOBE, Yuji Fujita, Kazuma Hasegawa, Yuuta KAJISAWA, Yugo NAGASHIMA +11 more 2025-06-17
12263897 Steering control system and steering control method Takashi KOUDAI, Yuji Fujita, Yugo NAGASHIMA, Kazuma Hasegawa, Yuuta KAJISAWA +9 more 2025-04-01
12240339 Power supply device Yuuta KAJISAWA, Yuji Fujita, Yugo NAGASHIMA, Kazuma Hasegawa, Takashi KOUDAI +10 more 2025-03-04
12233972 Control device for vehicle Yugo NAGASHIMA, Yuji Fujita, Kazuma Hasegawa, Yuuta KAJISAWA, Takashi KOUDAI +6 more 2025-02-25
12214830 Steering control device Yugo NAGASHIMA, Yuji Fujita, Yuuta KAJISAWA, Kazuma Hasegawa, Takashi KOUDAI +3 more 2025-02-04
12128964 Control device for vehicle Kazuma Hasegawa, Yuji Fujita, Yugo NAGASHIMA, Masaharu Yamashita, Shintaro Takayama +2 more 2024-10-29 $197,000
12116063 Steering system Masaharu Yamashita, Masataka OKUDA, Yosuke Yamashita, Yuji Fujita, Yuuta KAJISAWA +2 more 2024-10-15 $990,000
12116052 Motor drive system Akira Takesaki, Hisashi Kameya, Masaharu Yamashita, Kenji Shibata, Yosuke Yamashita +5 more 2024-10-15
12084126 Motor drive system 2024-09-10
12040681 Rotary electric machine Asuka Tanaka, Masashi Yamasaki, Takamasa Mutou, Yasuaki Koyano, Hisashi Yamamoto +1 more 2024-07-16
12024174 Control device for vehicle Kazuma Hasegawa, Yuji Fujita, Takashi Kodera, Isao Namikawa, Atsushi Ishihara +4 more 2024-07-02 $195,000
11987298 Motor control device and steering system having the same Takuya Maegawa, Hiroyasu Otake, Yuuta KAJISAWA, Yuji Fujita, Tokuaki HIBINO +3 more 2024-05-21
11973453 Motor drive system Masaharu Yamashita, Kenji Shibata, Yosuke Yamashita, Shoji Kubota, Yugo NAGASHIMA +2 more 2024-04-30
11239725 Drive apparatus 2022-02-01
10734853 Rotating electric machine with various ratios for permanent magnets and holes, rotor salient and magnetic poles, rotor laminations, air gaps and stator tooth thickness Makoto Taniguchi 2020-08-04
10427709 Electric motor and electric power steering apparatus having the same 2019-10-01
10312768 Electric motor and electric power steering device using same Koji Isogai 2019-06-04
10305344 Drive device Katsuya FUJISAKI, Koji Isogai, Makoto Taniguchi, Masahiro Goto 2019-05-28
10150499 Driving unit and electric power steering system Koji Isogai 2018-12-11