Patents by Inventor Keiko Numakura

Keiko Numakura 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).

  • Wireless communication method and mobile terminal used therefor
    Patent number: 7768978
    Abstract: In a VoIP system that employs the AMR coding system, by classifying packets by means of unequal error protection implemented during data coding based on the AMR coding system, and by transmitting packets through transport channels 26 corresponding to the required quality for the respective packets, an efficient and high-quality mobile communication system is obtained.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: August 3, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keiko Numakura, Akira Otsuka
  • Wireless communication method and mobile terminal used therefor
    Publication number: 20050025188
    Abstract: In a VoIP system that employs the AMR coding system, by classifying packets by means of unequal error protection implemented during data coding based on the AMR coding system, and by transmitting packets through transport channels 26 corresponding to the required quality for the respective packets, an efficient and high-quality mobile communication system is obtained.
    Type: Application
    Filed: November 8, 2001
    Publication date: February 3, 2005
    Inventors: Keiko Numakura, Akira Ohtsuka