Patents by Inventor Katsuaki Iwata

Katsuaki Iwata 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: 4529274
    Abstract: An electrochromic display device comprising an electrolyte held between a pair of substrates, at least one of which being transparent, a plurality of electrodes coated with electro-chemical coloration material formed on at least one substrate, at least a part of the plurality of electrodes composing display picture elements, wherein the display is of uniform density and can be changed only by changing the display between the plurality of electrodes coated with the electro-chemical coloration material.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: July 16, 1985
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventor: Katsuaki Iwata