TO

Tsutomu Omae

HI Hitachi: 16 patents #2,438 of 28,497Top 9%
HC Hitachi Automotive Engineering Co.: 2 patents #95 of 314Top 35%
Overall (All Time): #303,347 of 4,157,543Top 8%
16
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5357181 Failure detection method for electric vehicles and fail-safe control method using this method Nobuyoshi Mutoh, Ryoso Masaki, Sanshiro Obara, Shotaro Naito 1994-10-18
5033565 Motor-driven power steering apparatus Toshimi Abukawa, Toshiaki Okuyama, Kazuo Tahara, Katsuji Marumoto, Toshiyuki Koterazawa +6 more 1991-07-23
4960178 Motor-driven power steering apparatus Toshimi Abukawa, Toshiaki Okuyama, Kazuo Tahara, Katsuji Marumoto, Toshiyuki Koterazawa +6 more 1990-10-02
4839834 Speed detecting apparatus Toshihiko Matsuda, Youjirou Miyahara, Kenzo Kamiyama 1989-06-13
4814678 Speed control apparatus for motor Toshihiko Matsuda, Takashi Sukegawa, Masahiro Tobise 1989-03-21
4772996 Load current detecting device for pulse width modulation inverter Hiroyuki Hanei, Takeshi Hanada, Kenji Kubo, Masahiko Watanabe, Toshihiko Matsuda 1988-09-20
4753309 Electric power steering apparatus Katsuji Marumoto 1988-06-28
4712052 Digital servo-control system Sanshiro Obara, Kenji Kubo, Masahiko Watanabe 1987-12-08
4580083 Chopper controller for a D.C. motor Katsuji Marumoto, Shotaro Naito 1986-04-01
4468724 Method and apparatus for controlling load current Toshihiko Matsuda, Makoto Tachikawa 1984-08-28
4366420 Electromobile control device Katsuji Marumoto, Shotaro Naito 1982-12-28
4337509 Method and apparatus for controlling firing phases of thyristors Toshihiko Matsuda 1982-06-29
4311556 Method and system for inspection of inside of nuclear reactor vessel Taro Iwamoto, Shimon Ando, Sho Kusumoto, Toshitaka Suzuki, Masatake Takidera +3 more 1982-01-19
4249236 Controller for power converter Tosihiko Matuta 1981-02-03
4211961 Control circuit for use in control of current supply for electric motor with improved duty controlling oscillator circuit, particularly for electrical vehicle Katsuji Marumoto 1980-07-08
4207478 DC Chopper device Katsuji Marumoto, Schigeru Kuriyama 1980-06-10