Patents by Inventor Takeaki Koizumi

Takeaki Koizumi 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).

  • Polymer compound and polymer light emitting device
    Publication number: 20120200808
    Abstract: To provide a polymer compound which is useful as a light emitting material or charge transport material having a boron atom. A polymer compound comprising a structure represented by a formula (1) as described below: wherein R1, R2, and R3 each independently represents a hydrogen atom or a substituent.
    Type: Application
    Filed: November 15, 2006
    Publication date: August 9, 2012
    Applicants: TOKYO INSTITUTE OF TECHNOLOGY, SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Takakazu Yamamoto, Choi Bongjin, Takeaki Koizumi, Isao Yamaguchi, Osamu Goto, Makoto Anryu