Patents by Inventor Jorge Lach

Jorge Lach 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 apparatus for a self-clearing copy mode in a frame-buffer memory
    Patent number: 4988985
    Abstract: A three-dimensional frame-buffer memory organized into a series of planes each storing one bit representative of a pixel on the display can draw a figure onto one of the planes. The figure can then be copied to preselected ones of the other planes while the first plane is cleared. A bit block transfer can be performed from an "invisible" portion of the first plane to pre-selected ones of the other planes.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: January 29, 1991
    Assignee: Schlumberger Technology Corporation
    Inventors: Anthony C. Barkans, Jorge Lach
  • Guardband clipping method and apparatus for 3-D graphics display system
    Patent number: 4888712
    Abstract: A system for clipping polygons representing three-dimensional objects to produce a representation of the portion of the objects in a desired viewing space is disclosed. A guardband space at least partially enclosing the viewing space is defined. The polygons are compared to the guardband space to determine which polygons intersect at least one of the guardband planes defining the guardband space. The intersecting polygons are also compared to the viewing space to determine if they intersect at least one of the viewing planes defining the viewing space. Only polygons intersecting both a viewing plane and a guardband plane are clipped.
    Type: Grant
    Filed: November 4, 1987
    Date of Patent: December 19, 1989
    Assignee: Schlumberger Systems, Inc.
    Inventors: Anthony C. Barkans, Brian D. Schroeder, Thomas L. Durant, Dorothy Gordon, Jorge Lach