Patents by Inventor David A. Nation

David A. Nation 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).

  • Patent number: 7392488
    Abstract: Method and system to enable a user to view large collections of hierarchically linked information on a computer based display. A tree structure visualization is created which presents a representation of the complete collection of information on the display. The visualization fits completely within a fixed area of the computer based display, negating the need to scroll information into the display area. The visualization is based on identified focus nodes and through calculation of a Degree of Interest (DOI) for each of the nodes based in the structure. Layout and presentation of the visualization structure is based on the DOI values in combination with considerations of available display space. A user may dynamically manipulate views of the structure by selecting one or more focus nodes, thus causing a recalculation of the degree of interest.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: June 24, 2008
    Assignee: Xerox Corporation
    Inventors: Stuart K. Card, David A. Nation
  • Publication number: 20050273730
    Abstract: Method and system to enable a user to view large collections of hierarchically linked information on a computer based display. A tree structure visualization is created which presents a representation of the complete collection of information on the display. The visualization fits completely within a fixed area of the computer based display, negating the need to scroll information into the display area. The visualization is based on identified focus nodes and through calculation of a Degree of Interest (DOI) for each of the nodes based in the structure. Layout and presentation of the visualization structure is based on the DOI values in combination with considerations of available display space. A user may dynamically manipulate views of the structure by selecting one or more focus nodes, thus causing a recalculation of the degree of interest.
    Type: Application
    Filed: July 20, 2005
    Publication date: December 8, 2005
    Inventors: Stuart Card, David Nation
  • Patent number: 6944830
    Abstract: Method and system to enable a user to view large collections of hierarchically linked information on a computer based display. A tree structure visualization is created which presents a representation of the complete collection of information on the display. The visualization fits completely within a fixed area of the computer based display, negating the need to scroll information into the display area. The visualization is based on identified focus nodes and through calculation of a Degree of Interest (DOI) for each of the nodes based in the structure. Layout and presentation of the visualization structure is based on the DOI values in combination with considerations of available display space. A user may dynamically manipulate views of the structure by selecting one or more focus nodes, thus causing a recalculation of the degree of interest.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: September 13, 2005
    Assignee: Xerox Corporation
    Inventors: Stuart K. Card, David A. Nation
  • Patent number: 6646652
    Abstract: Method and system to enable a user to view large collections of linked information on a computer based display. A visualization is created which presents a representation of the complete collection of information on the display. The visualization fits completely within a fixed area of the computer-based display, negating the need to scroll information into the display area. The visualization is based on identified focus nodes and through calculation of a Degree of Interest (DOI) for each of the nodes based in the structure. Layout and presentation of the visualization structure is based on the DOI values in combination with considerations of available display space. A user may dynamically manipulate views of the structure by selecting one or more focus nodes, thus causing a recalculation of the degree of interest.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: November 11, 2003
    Assignee: Xerox Corporation
    Inventors: Stuart K. Card, David A. Nation
  • Publication number: 20030085931
    Abstract: Method and system to enable a user to view large collections of hierarchically linked information on a computer based display. A tree structure visualization is created which presents a representation of the complete collection of information on the display. The visualization fits completely within a fixed area of the computer based display, negating the need to scroll information into the display area. The visualization is based on identified focus nodes and through calculation of a Degree of Interest (DOI) for each of the nodes based in the structure. Layout and presentation of the visualization structure is based on the DOI values in combination with considerations of available display space. A user may dynamically manipulate views of the structure by selecting one or more focus nodes, thus causing a recalculation of the degree of interest.
    Type: Application
    Filed: December 21, 2000
    Publication date: May 8, 2003
    Applicant: Xerox Corporation
    Inventors: Stuart K. Card, David A. Nation
  • Publication number: 20020118214
    Abstract: Method and system to enable a user to view large collections of linked information on a computer based display. A visualization is created which presents a representation of the complete collection of information on the display. The visualization fits completely within a fixed area of the computer-based display, negating the need to scroll information into the display area. The visualization is based on identified focus nodes and through calculation of a Degree of Interest (DOI) for each of the nodes based in the structure. Layout and presentation of the visualization structure is based on the DOI values in combination with considerations of available display space. A user may dynamically manipulate views of the structure by selecting one or more focus nodes, thus causing a recalculation of the degree of interest.
    Type: Application
    Filed: December 21, 2000
    Publication date: August 29, 2002
    Applicant: Xerox Corporation
    Inventors: Stuart K. Card, David A. Nation
  • Patent number: 5475802
    Abstract: Signal transformations of inputted data brought about by 58 new subroutines in combination with other subroutines to display world maps or other display items with the unique capability of performing the following functions in complete generality. (1) Arbitrary selection of map center and coverage, including global displays, (2) filling of all land and lake areas defined by polygons composed of an arbitrary number of vertices, (3) clipping of map features and overlays at map boundaries and poles, (4) selection from any of nineteen currently implemented map projections with provision to install any other projection topologically similar to an oblique conic, (5) calculation of latitude/longitude for any point on a map without the need for inverse mapping equations, and (6) an efficient method of plotting polyline segments along great circles. These are a number of feature functions provided by this inventive concept.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: December 12, 1995
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Thomas F. Wescott, Lawrence E. McCleary, David A. Nation
  • Patent number: 5341463
    Abstract: Signal transformations of inputted data brought about by 58 new subroutines in combination with other subroutines to display world maps or other display items with the unique capability of performing the following functions in complete generality. (1) Arbitrary selection of map center and coverage, including global displays, (2) filling of all land and lake areas defined by polygons composed of an arbitrary number of vertices, (3) clipping of map features and overlays at map boundaries and poles, (4) selection from any of nineteen currently implemented map projections with provision to install any other projection topologically similar to an oblique conic, (5) calculation of latitude/longitude for any point on a map without the need for inverse mapping equations, and (6) an efficient method of plotting polyline segments along great circles. These are a number of feature functions provided by this inventive concept.
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: August 23, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Thomas F. Wescott, Lawrence E. McCleary, David A. Nation