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

Hirofumi Kako — 29 Patents

Denso: 28 patents #197 of 11,792Top 2%
Toyota: 2 patents #10,861 of 26,838Top 45%
Overall (All Time): #130,015 of 4,157,543Top 4%
29 Patents All Time

Issued Patents All Time

Showing 26–29 of 29 patents

Patent #TitleCo-InventorsDate
8884564 Voltage converter and voltage converter system including voltage converter Takeshi Itoh 2014-11-11
8639405 Electric motor drive system for an electric vehicle Kenji Yamada, Akiyoshi Morii 2014-01-28
8258728 Rotary electric machine control system Takeshi Itoh 2012-09-04
8164287 Motor drive control apparatus and method Kenji Yamada, Takeshi Itoh 2012-04-24