Patents by Inventor Youichiro Chaki

Youichiro Chaki 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).

  • Modeling and deformation of 3-dimensional objects
    Patent number: 6236403
    Abstract: A method of modeling a 3-dimensional object including performing one of a rounding operation generating the 3-dimensional object from a control grid and an inverse rounding operation generating a control grid from the 3-dimensional object depending on which one of the control grid and the 3-dimensional object is newly provided, the control grid including a plurality of edges and a plurality of vertexes, the 3-dimensional object including a plurality of boundary curves and a plurality of curved surfaces deforming the control grid by shifting the plurality of vertexes, performing the rounding operation when the control grid is deformed so as to introduce the deformation of the control grid to the 3-dimensional object, attaching a weight to one of the plurality of vertexes of the control grid to deform a corresponding one of the plurality of curved surfaces of the 3-dimensional object, attaching a weight to one of the plurality of edges of the control grid to deform a corresponding one of the plurality of bounda
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: May 22, 2001
    Assignees: Ricoh Company, Ltd., Hiroaki Chiyokura
    Inventors: Youichiro Chaki, Atsushi Nakamura, Hiroaki Chiyokura