Patents by Inventor Mitsuo Ikehara

Mitsuo Ikehara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pointing device
    Patent number: 6400353
    Abstract: A pointing device which can be operated by a disabled person with a declined muscular strength, even when the person lies in a bed, to move a cursor and make a click separately not only by one hand but also by a body portion having a motor function with a light touch without any complex movement and large motion, and which does not need any operation area.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: June 4, 2002
    Assignee: Tsuken Electric Industrial Co., Ltd.
    Inventors: Mitsuo Ikehara, Hironori Akama, Noriko Akama
  • PWM power converter using mixed bipolar and static induction transistors
    Patent number: 5021936
    Abstract: This invention relates to a PWM power converter for switching a plurality of bridge-connected semiconductor switching elements based on PWM signals. As the semiconductor switching elements, elements with a low ON voltage and small conduction loss, and elements with a small switching loss and capable of high-speed switching are combined to improve power conversion efficiency.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: June 4, 1991
    Assignees: Zaidan Hojin Handotai Kenkyu Sinkokai, Tohoku Electric Power Company, Incorporated, Tsuken Electric Ind. Co., Ltd.
    Inventors: Jun-ichi Nishizawa, Takashige Tamamushi, Koichi Mitamura, Hiroo Takahashi, Kiyoo Mitsui, Mitsuo Ikehara, Toyota Wako, Sinpei Maruyama