Patents by Inventor Mutsuaki Shinagawa

Mutsuaki Shinagawa 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).

  • Electrochromic display device
    Patent number: 4326777
    Abstract: An electrochromic display device is disclosed including a cell container, a display electrode and a counter electrode both of a chemically stable conductor material. Also included in the container is an electrochromic aqueous solution composed of N,N'-di(p-cyanophenyl)-4,4'-bipyridinium dichloride, phosphoric acid and ammonium ferrous sulfate as a source of ferrous ions.
    Type: Grant
    Filed: November 21, 1979
    Date of Patent: April 27, 1982
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Rikusei Kohara, Susumu Kakumoto, Takashi Aoyama, Masami Shoji, Mutsuaki Shinagawa