Patents by Inventor Masaaki Takakubo

Masaaki Takakubo 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).

  • Polypyrrole film and method of producing the same
    Patent number: 4818646
    Abstract: A film of polypyrrole doped with a transition metal complex anion having a higher oxidation number of a redox couple consisting of transition metal complex anions and a method of producing the polypyrrole film by electrochemical polymerization are disclosed.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: April 4, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaaki Takakubo, Toshiyuki Ohsawa