Patents by Inventor Natsuko Tamai

Natsuko Tamai 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).

  • Stereoscopic sheet structure
    Patent number: 7974006
    Abstract: The present invention serves to provide a stereoscopic sheet structure in which a three-dimensional design appears to be changing by changing the angle of observation. The stereoscopic sheet structure has a convex lens assembly which is formed on one surface of a sheet member and in which a plurality of convex lenses are arranged; and a repeating design portion in which a plurality of design units are arranged on a focal plane of the convex lenses at arrangement intervals and/or in arrangement directions different from those of the convex lenses, and which has a continuously deformed design portion in which the arrangement intervals and arrangement directions of the design units regularly change.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: July 5, 2011
    Assignee: Grapac Japan Co., Inc.
    Inventor: Natsuko Tamai
  • Stereoscopic sheet structure
    Publication number: 20110051238
    Abstract: The present invention serves to provide a stereoscopic sheet structure in which a three-dimensional design appears to be changing by changing the angle of observation. The stereoscopic sheet structure has a convex lens assembly which is formed on one surface of a sheet member and in which a plurality of convex lenses are arranged; and a repeating design portion in which a plurality of design units are arranged on a focal plane of the convex lenses at arrangement intervals and/or in arrangement directions different from those of the convex lenses, and which has a continuously deformed design portion in which the arrangement intervals and arrangement directions of the design units regularly change.
    Type: Application
    Filed: October 27, 2010
    Publication date: March 3, 2011
    Applicant: GRAPAC JAPAN CO., INC.
    Inventor: Natsuko Tamai
  • Stereoscopic sheet structure
    Patent number: 7852557
    Abstract: An object of the present invention is to provide a stereoscopic sheet structure in which a three-dimensional design appears to be changing by changing the angle of observation, the stereoscopic sheet structure being a stereoscopic sheet structure that has: a convex lens assembly which is formed on one surface of a sheet member and in which a plurality of convex lenses are arranged; and a repeating design portion in which a plurality of design units are arranged on a focal plane of the convex lenses at arrangement intervals and/or in arrangement directions different from those of the convex lenses, and which has a continuously deformed design portion in which the arrangement intervals and arrangement directions of the design units regularly change while satisfying the condition of 0.95?DN˜N+1/DN+1˜N+2?0.95 and ?1???+1.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: December 14, 2010
    Assignee: Grapac Japan Co., Inc.
    Inventor: Natsuko Tamai
  • STEREOSCOPIC SHEET STRUCTURE
    Publication number: 20090225419
    Abstract: An object of the present invention is to provide a stereoscopic sheet structure in which a three-dimensional design appears to be changing by changing the angle of observation, the stereoscopic sheet structure being a stereoscopic sheet structure that has: a convex lens assembly which is formed on one surface of a sheet member and in which a plurality of convex lenses are arranged; and a repeating design portion in which a plurality of design units are arranged on a focal plane of the convex lenses at arrangement intervals and/or in arrangement directions different from those of the convex lenses, and which has a continuously deformed design portion in which the arrangement intervals and arrangement directions of the design units regularly change while satisfying the condition of 0.95?DN˜N+1/DN+1˜N+2?0.95 and ?1???+1.
    Type: Application
    Filed: January 18, 2007
    Publication date: September 10, 2009
    Inventor: Natsuko Tamai