Patents by Inventor Takeshi Hashidate

Takeshi Hashidate 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).

  • Antenna device commonly used for two frequencies
    Patent number: 6992634
    Abstract: A patch antenna for a first frequency is disposed on a first face of a dielectric substrate, and has a first size. A coil antenna for a second frequency is disposed on the first face of the dielectric substrate so as to surround the patch antenna, and has a second size which is larger than the first size. A ground member is disposed on a second face of the dielectric substrate, and has a third size which is larger than the first size and smaller than the second size.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: January 31, 2006
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Takeshi Hashidate, Iichi Wako
  • Antenna device commonly used for two frequencies
    Publication number: 20050104789
    Abstract: A patch antenna for a first frequency is disposed on a first face of a dielectric substrate, and has a first size. A coil antenna for a second frequency is disposed on the first face of the dielectric substrate so as to surround the patch antenna, and has a second size which is larger than the first size. A ground member is disposed on a second face of the dielectric substrate, and has a third size which is larger than the first size and smaller than the second size.
    Type: Application
    Filed: July 28, 2004
    Publication date: May 19, 2005
    Inventors: Takeshi Hashidate, Iichi Wako