Patents by Inventor Shiyoojiro Kodai

Shiyoojiro Kodai 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: 4889749
    Abstract: An identification card comprises a center core layer, a photograph embedded in the core layer, a first assembly of multiple layers laminated on the upper surface of the core layer and the photograph, and a second assembly of multiple layers laminated on the back surface of the core layer and the photograph. The layers of the first and second assemblies have substantially similar thermal expansion properties. Accordingly, the thickness of the identification card is uniform since the thickness of the core layer is substantially the same as the thickness of the photograph. High reliability can be obtained without any accompanying warp as a result of the substantially symmetrical arrangement of the first and second assemblies with respect to the core layer and the embedded photograph.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: December 26, 1989
    Assignees: Ryoden Kasei Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masato Ohashi, Shiyoojiro Kodai