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

Hiroshi Kuroiwa — 90 Patents

Hitachi: 78 patents #77 of 28,497Top 1%
HCHitachi Car Engineering Co.: 11 patents #43 of 465Top 10%
HCHitachi Automotive Engineering Co.: 7 patents #4 of 314Top 2%
RERenesas Electronics: 6 patents #669 of 4,529Top 15%
RTRenesas Technology: 3 patents #990 of 3,337Top 30%
JAJatco: 1 patents #458 of 871Top 55%
Nissan Motor Co.: 1 patents #4,519 of 8,689Top 55%
HCHitachi Ulsi Systems Co.: 1 patents #577 of 867Top 70%
Tokyo, JP: #556 of 90,295 inventorsTop 1%
Overall (All Time): #17,911 of 4,157,543Top 1%
90 Patents All Time
Hiroshi Kuroiwa has been granted 90 US patents while listed as an inventor at Hitachi. The first was granted in 1981 and the most recent in August 2021. Hiroshi Kuroiwa ranks #17,911 of 4,157,543 US inventors in our database (top 0.43%). Patent records list Hiroshi Kuroiwa in Tokyo, JP.

Patents per Year

Patents granted per year, 1983 to 2021Bar chart with a peak of 7 patents in 1997.peak 71983: 4 patents19831984: 6 patents1985: 3 patents1986: 3 patents19861988: 1 patents1989: 1 patents1992: 1 patents19921993: 2 patents1994: 1 patents1995: 4 patents19951996: 3 patents1997: 7 patents1998: 4 patents19981999: 2 patents2000: 5 patents2001: 4 patents20012002: 2 patents2003: 3 patents2004: 4 patents20042005: 3 patents2006: 3 patents2007: 3 patents20072008: 3 patents2009: 6 patents2010: 2 patents20102011: 1 patents2013: 1 patents2017: 2 patents20172019: 2 patents2021: 1 patents2021

Issued Patents All Time

Showing 1–25 of 90 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11077852 Shift control device and shift control method for vehicle Toshimitsu Araki, Tomoaki Honma, Yasuhiro Endo 2021-08-03
10396547 Semiconductor device and power control device Ryo Kanda, Tetsu Toda, Yasushi Nakahara 2019-08-27
10224921 Semiconductor device and electric power control apparatus Ryo Kanda, Koichi Yamazaki, Masatoshi Maeda, Tetsu Toda 2019-03-05
9667142 Power supply device with shared inductive elements under switch control Osamu Yamashita, Masahiro Ishihara, Minoru Kurosawa 2017-05-30
9621151 Semiconductor device and electric power control apparatus Ryo Kanda, Koichi Yamazaki, Masatoshi Maeda, Tetsu Toda 2017-04-11
8482233 Hard disc device control circuit and hard disc device 2013-07-09
7967721 Control apparatus for an automatic transmission Hiroyuki Sakamoto, Masahiko Ibamoto 2011-06-28 $117,000
7848044 VCM driver and PWM amplifier Yasuhiko Kokami 2010-12-07
7710678 VCM driver and PWM amplifier Yasuhiko Kokami 2010-05-04
7632209 Vehicular drive system and driving method Hiroyuki Sakamoto, Masahiko Ibamoto 2009-12-15 $89,000
7628720 Vehicle control apparatus and method Hiroyuki Sakamoto, Masahiko Ibamoto 2009-12-08 $93,000
7575084 Automobile and control apparatus, and power train system of automobile Kinya Fujimoto, Tetsuo Matsumura, Naoyuki Ozaki 2009-08-18 $107,000
7503233 Vehicle control apparatus and control method Kentaro Shishido, Yoshiyuki Yoshida, Tetsuo Matsumura, Kinya Fujimoto 2009-03-17 $87,000
7492132 Switching regulator Yasuhiko Kokami, Osamu Yamashita 2009-02-17 $111,000
7476176 Automatic transmission, dynamo-electric machine, and car Masahiko Ibamoto 2009-01-13 $173,000
7370551 Gearshift operating device Kenichiro Tokuo, Masaru Yamasaki, Naoyuki Ozaki 2008-05-13 $165,000
7367917 Shift change control system and automatic transmission system of automobile Hiroyuki Sakamoto, Masahiko Ibamoto 2008-05-06 $206,000
7331897 Active shift transmission, transmission control unit and automobile Masahiko Ibamoto, Hiroyuki Sakamoto 2008-02-19 $177,000
7226379 Active shift transmission, transmission control unit and automobile Masahiko Ibamoto, Hiroyuki Sakamoto 2007-06-05 $201,000
7211028 Method of controlling a vehicle, apparatus for controlling the same, transmission and apparatus for controlling the same Tetsuo Matsumura, Naoyuki Ozaki, Kinya Fujimoto, Takashi Okada 2007-05-01 $181,000
7165470 Vehicular drive system and driving method Hiroyuki Sakamoto, Masahiko Iabamoto 2007-01-23 $138,000
7150698 Power transmission apparatus for automobile Hiroshi Sakamoto, Toshimichi Minowa, Takashi Okada, Mitsuo Kayano, Tatsuya Ochi +1 more 2006-12-19 $173,000
7093512 Automatic transmission, dynamo-electric machine, and car Masahiko Ibamoto 2006-08-22 $135,000
7083545 Automatic transmission system and automobile using the system Masahiko Ibamoto, Hiroyuki Sakamoto 2006-08-01 $108,000
6961647 Method of controlling a vehicle and system of controlling the same Tetsuo Matsumura, Naoyuki Ozaki, Kinya Fujimoto, Takashi Okada, Toshimichi Minowa 2005-11-01 $153,000