Patents by Inventor Yoshinori Yama

Yoshinori Yama 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).

  • Coin-like products, identification method thereof and identification device thereof
    Publication number: 20040173434
    Abstract: The present invention provides a new identification method • identification device of a coin-like product, and a coin-like product having a structure for identification that makes the identification method applicable. The coin-like product 1 of the present invention has a laminate structure formed by two or more kinds of metal layers 11 and 12. The first layer 11, which is a surface layer on one plate side of the laminate structure, and the second layer 12, which is a surface layer on the other plate side of the laminate structure, have different electric conductivities, which makes it possible to identify the structure by a reflex electronic sensor.
    Type: Application
    Filed: January 9, 2004
    Publication date: September 9, 2004
    Applicant: Japan Mint
    Inventors: Shinichi Morita, Yoshinori Yama, Hideaki Mori
  • Method and apparatus for manufacturing disk products having helical ridges
    Patent number: 5953950
    Abstract: A method and an apparatus for producing a disc product having a plane carng a relief and helical ridges on the outer peripheral side. The inventive production method and the apparatus therefor have enabled a continuous processing of a material mass to forge into, produce and push out a disc product while retaining the quality of the relief plane, and thereby facilitating production of the disc product by die forging.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: September 21, 1999
    Assignee: Japan, represented by Director-General, Mint Bureau, Ministry of Finance
    Inventors: Shinkichi Sasaoka, Yoshinori Yama, Fujio Sakatani, Shouichi Tsuruga