Patents by Inventor Tomoya Imagawa

Tomoya Imagawa 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).

  • Electronic device and program for operating the same
    Patent number: 8010739
    Abstract: A navigation device realizes such processing as map display and route guidance based on map data stored in a memory card. The data in the memory card tends to be volatilized with an increase in the frequency of reading of data. Therefore, the data that are highly frequently read out are held in a RAM so as to be read from the memory card at a decreased frequency. Further, the passage of time is calculated from the date and hour the data are recorded in the memory card, and the whole data in the memory card are refreshed every time when the passage of time exceeds a threshold value T1.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: August 30, 2011
    Assignee: DENSO CORPORATION
    Inventors: Yoshinori Watanabe, Tomoya Imagawa, Yuki Nakai, Makoto Ono, Takemi Ueno, Hiroki Tanaka
  • ELECTRONIC DEVICE AND PROGRAM FOR OPERATING THE SAME
    Publication number: 20090144489
    Abstract: A navigation device realizes such processing as map display and route guidance based on map data stored in a memory card. The data in the memory card tends to be volatilized with an increase in the frequency of reading of data. Therefore, the data that are highly frequently read out are held in a RAM so as to be read from the memory card at a decreased frequency. Further, the passage of time is calculated from the date and hour the data are recorded in the memory card, and the whole data in the memory card are refreshed every time when the passage of time exceeds a threshold value T1.
    Type: Application
    Filed: September 26, 2008
    Publication date: June 4, 2009
    Applicant: DENSO CORPORATION
    Inventors: Yoshinori WATANABE, Tomoya IMAGAWA, Yuki NAKAI, Makoto ONO, Takemi UENO, Hiroki TANAKA