Patents by Inventor Akihiko Numazawa

Akihiko Numazawa 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).

  • Organic EL element and method of producing the same
    Patent number: 7038372
    Abstract: A first electrode is formed above a substrate, organic material layers are stacked above the first electrode, and a second electrode is formed above the organic material layers. Among the organic material layers, at least two organic material layers having interfaces which electrons or holes traverse are formed by layers which are heat-treated at a temperature that is equal to or higher than the glass transition points of materials respectively constituting the organic material layers and equal to or lower than the melting points of the materials.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: May 2, 2006
    Assignee: Tohoku Pioneer Corporation
    Inventors: Toshinao Yuki, Kunihiko Shirahata, Akihiko Numazawa, Shinsuke Tanaka, Tsuyoshi Naijo, Masato Nakamura, Yusuke Nakajima
  • Organic EL element and method of producing the same
    Publication number: 20050012451
    Abstract: A first electrode is formed above a substrate, organic material layers are stacked above the first electrode, and a second electrode is formed above the organic material layers. Among the organic material layers, at least two organic material layers having interfaces which electrons or holes traverse are formed by layers which are heat-treated at a temperature that is equal to or higher than the glass transition points of materials respectively constituting the organic material layers and equal to or lower than the melting points of the materials.
    Type: Application
    Filed: June 10, 2004
    Publication date: January 20, 2005
    Inventors: Toshinao Yuki, Kunihiko Shirahata, Akihiko Numazawa, Shinsuke Tanaka, Tsuyoshi Naijo, Masato Nakamura, Yusuke Nakajima