Patents Assigned to Sumiya Hobo Research Associate
  • Dental shade system
    Patent number: 6328563
    Abstract: A dental shade system that includes one or more triangular pillars on three faces of which many different color samples are arranged and by which the natural tooth color can be compared with the color samples with one or two actions and decided visually in terms of three coordinates in color space, in order of Value (lightness), Chroma (color saturation), and Hue (color).
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: December 11, 2001
    Assignees: GC Corporation, Sumiya Hobo Research Associate
    Inventor: Sumiya Hobo