Patents by Inventor Tohru Wakihara

Tohru Wakihara 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).

  • Fluorescent substance and light-emitting device
    Patent number: 7638934
    Abstract: A fluorescent substance is provided, with includes a matrix composed of a compound having an AlN polytypoid structure represented by the following general formula (1), and a luminescence center element: (Al,M)a(N,X)b??(1) wherein, M is at least one metal excluding Al, X is at least one non-metal excluding N, and a and b are positive values.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: December 29, 2009
    Assignees: Kabushiki Kaisha Toshiba, National University Corporation Yokohama National University
    Inventors: Yumi Fukuda, Masaaki Tamatani, Hironori Asai, Naotoshi Matsuda, Ryosuke Hiramatsu, Keiko Albessard, Jun-ichi Tatami, Katsutoshi Komeya, Tohru Wakihara
  • Fluorescent substance and light-emitting device
    Publication number: 20060290269
    Abstract: A fluorescent substance is provided, with includes a matrix composed of a compound having an AlN polytypoid structure represented by the following general formula (1), and a luminescence center element: (Al, M)a(N, X)b ??(1) wherein, M is at least one metal excluding Al, X is at least one non-metal excluding N, and a and b are positive values.
    Type: Application
    Filed: May 31, 2006
    Publication date: December 28, 2006
    Inventors: Yumi Fukuda, Masaaki Tamatani, Hironori Asai, Naotoshi Matsuda, Ryosuke Hiramatsu, Keiko Albessard, Jun-ichi Tatami, Katsutoshi Komeya, Tohru Wakihara