Patents by Inventor Hongliu Zou

Hongliu Zou 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).

  • Method and system for applying constraints to chains of curves
    Patent number: 6897862
    Abstract: A method and system for applying constraints to a wireframe chain of curves for Computer-Aided Design (CAD) is disclosed, whereby a geometric constraint network can be expanded to include chains of curves as types of wireframe entities. As such, a chain of curves can be represented as one composite curve. As a result, a constraint solver can generate and/or maintain any constraint on a chain of curves, which enables the constraints to be solved while moving along the curves independently from the chain's geometry and topology changes.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: May 24, 2005
    Assignee: UGS Corp.
    Inventors: Yu Jiang, Hongliu Zou, Sangeeta Gupta, Jack C. H. Chung
  • Method and system for applying constraints to chains of curves
    Publication number: 20030156110
    Abstract: A method and system for applying constraints to a wireframe chain of curves for Computer-Aided Design (CAD) is disclosed, whereby a geometric constraint network can be expanded to include chains of curves as types of wireframe entities. As such, a chain of curves can be represented as one composite curve. As a result, a constraint solver can generate and/or maintain any constraint on a chain of curves, which enables the constraints to be solved while moving along the curves independently from the chain's geometry and topology changes.
    Type: Application
    Filed: February 19, 2002
    Publication date: August 21, 2003
    Applicant: Electronic Data Systems Corporation
    Inventors: Yu Jiang, Hongliu Zou, Sangeeta Gupta, Jack C.H. Chung