Patents by Inventor Norimasa Sengoku

Norimasa Sengoku 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).

  • Encoder for detecting movement of an object
    Patent number: 7214931
    Abstract: An encoder for stably detecting the amount of movement of an object. The encoder includes an LED for emitting light toward a rotor plate including slits. An optical sensor generates an ON signal when the amount of emitted light passing through the slits exceeds a threshold value. A current increasing circuit increases the amount of current flowing through the LED when the optical sensor generates an ON signal.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: May 8, 2007
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Norimasa Sengoku, Yasuhiko Futamura, Shigeji Ito
  • Apparatus for detecting the rotation angle of a rotational body
    Patent number: 7073398
    Abstract: A rotation angle detection apparatus for reducing power consumption. A magnetoresistance element generates first and second analog signals, which change cyclically and continuously each time a steering shaft is rotated by 60 degrees. A microcomputer determines the rotation angle of the steering shaft from the output value and number of cycles of the analog signals.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: July 11, 2006
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Seiji Kondo, Toru Ueno, Yasuhiko Futamura, Norimasa Sengoku, Mikihisa Araki, Yousuke Obata
  • Encoder
    Publication number: 20050199791
    Abstract: An encoder for stably detecting the amount of movement of an object. The encoder includes an LED for emitting light toward a rotor plate including slits. An optical sensor generates an ON signal when the amount of emitted light passing through the slits exceeds a threshold value. A current increasing circuit increases the amount of current flowing through the LED when the optical sensor generates an ON signal.
    Type: Application
    Filed: March 9, 2005
    Publication date: September 15, 2005
    Applicant: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Norimasa Sengoku, Yasuhiko Futamura, Shigeji Ito