KS

Keizo Shimada

HI Hitachi: 11 patents #3,813 of 28,497Top 15%
HC Hitachi Construction Machinery Co.: 3 patents #381 of 1,234Top 35%
HC Hitachi Engineering Co.: 1 patents #187 of 572Top 35%
OC Oki Electric Industry Co.: 1 patents #1,459 of 2,807Top 55%
Overall (All Time): #385,405 of 4,157,543Top 10%
13
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8523296 Electric drive vehicle Akira Kikuchi, Takashi Ikimi, Naoshi Sugawara 2013-09-03
8151915 Electric drive vehicle Akira Kikuchi, Kichio Nakajima, Toshikazu Minoshima, Tomohiko Yasuda, Takashi Ikimi 2012-04-10
7888894 Electric motor control system, series hybrid vehicle, electric motor control apparatus, and electric motor control method Naoshi Sugawara, Tetsuhiro Fujimoto, Yasuhiro Kiyofuji, Akira Kikuchi, Kazuhiro Imaie 2011-02-15
7841434 Electric drive system for vehicle, electric control system for vehicle, electric drive method for vehicle Yasuhiro Kiyofuji, Naoshi Sugawara, Kazuhiro Imaie, Shintarou Oku, Takashi Yagyu 2010-11-30
7583036 Electrically driven vehicle Akira Kikuchi, Takashi Ikimi, Naoshi Sugawara 2009-09-01
7548439 Electric power converter for reducing generated high frequency components Hikaru Meguro, Hiroshi Ikarashi, Masashi Toyota 2009-06-16
7542312 Electric power converter Hikaru Meguro, Hiroshi Ikarashi, Masashi Toyota 2009-06-02
7315144 AC drive apparatus, vehicle control apparatus, and power conversion method and vehicle control method Kazuhiro Imaie, Takashi Yagyu, Yasuhiro Kiyofuji, Naoshi Sugawara 2008-01-01
7025514 Development apparatus for manufacturing semiconductor device Yasuharu Ohta 2006-04-11
6084785 Electric power converter Hideaki Kunisada, Hideyasu Umetsu 2000-07-04
5959858 Electric power conversion apparatus Akihiko Kanouda, Yoshimi Sakurai, Kenji Kubo, Hideyasu Umetsu, Hideaki Kunisada +1 more 1999-09-28
5892674 Method and apparatus for power converting AC into DC or DC into AC by converter having common phase connection Hideyasu Umetsu, Hideaki Kunisada 1999-04-06
5446645 Inverter apparatus and uinterruptible power supply using the same Hidefumi Shirahama, Yorito Jifuku, Akira Kobayashi, Norikazu Tokunaga, Yoshimi Sakurai +3 more 1995-08-29