Patents by Inventor Fumihiko Onuma

Fumihiko Onuma 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).

  • Patent number: 9451734
    Abstract: A magnetic shielding device includes: a passive shield having an inner space; a first coil that cancels a magnetic field entering in the inner space; a first magnetic sensor that measures the magnetic field entering in the inner space; a second magnetic sensor located in a position farther from the first coil than the first magnetic sensor; and a controller that controls the first coil so that a gradient between a first magnetic field measured by the first magnetic sensor and a second magnetic field measured by the second magnetic sensor be less than a predetermined threshold.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: September 20, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Fumihiko Onuma, Shigemitsu Toda, Ryuji Hokari
  • Publication number: 20140077612
    Abstract: A magnetic shielding device includes: a passive shield having an inner space; a first coil that cancels a magnetic field entering in the inner space; a first magnetic sensor that measures the magnetic field entering in the inner space; a second magnetic sensor located in a position farther from the first coil than the first magnetic sensor; and a controller that controls the first coil so that a gradient between a first magnetic field measured by the first magnetic sensor and a second magnetic field measured by the second magnetic sensor be less than a predetermined threshold.
    Type: Application
    Filed: September 17, 2013
    Publication date: March 20, 2014
    Applicant: Seiko Epson Corporation
    Inventors: Fumihiko Onuma, Shigemitsu Toda, Ryuji Hokari