Patents by Inventor Kiyoshi Yamura

Kiyoshi Yamura 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).

  • Patent number: 7244280
    Abstract: A method for producing an electrochemical device which exhibits improved output performance and improved durability in thermal, chemical, and mechanical is provided. The electrochemical device includes a first electrode, a second electrode, and an ion exchange membrane held between the two electrodes. The method includes forming a catalyst layer containing a catalytic substance such as platinum and polyvinylidene fluoride and attaching ion exchange groups to the polyvinylidene fluoride in the catalyst layer. The resulting catalyst layer containing ion exchange groups is used for at least either of the first and second electrodes.
    Type: Grant
    Filed: December 26, 2003
    Date of Patent: July 17, 2007
    Assignee: Sony Corporation
    Inventor: Kiyoshi Yamura