Patents by Inventor Thieu Quang Nguyen

Thieu Quang Nguyen 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).

  • Application programming interface for accessing document analysis functionality of a block selection program
    Patent number: 5659767
    Abstract: An application programming interface accesses page analysis functionality of a block selection program and accesses data structures resulting therefrom. The application programming interface includes plural page analysis functionality which manipulate block selection functions including functions to analyze a document page, to create a hierarchical tree structure corresponding to the analyzed document page, and to return a pointer which is a block ID or a root node of the analyzed page. Plural hierarchical tree structure accessing functions traverse the hierarchical tree structure, and locate desired nodes in the hierarchical tree structure.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: August 19, 1997
    Assignee: Canon Information Systems, Inc.
    Inventors: Thieu Quang Nguyen, Mann Chang