Patents by Inventor Elizabeth A. Clough

Elizabeth A. Clough 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).

  • Apparatus for distinguishing information stored in a frame buffer
    Patent number: 5274753
    Abstract: An arrangement for storing video and graphic information from video and graphics sources to be displayed on a computer output display including a single frame buffer having first and second separately addressable areas, the first of such areas being adapted to store pixel information, the second of such areas being adapted to store information regarding the type of information stored at each pixel of the first of such areas.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: December 28, 1993
    Assignee: Apple Computer, Inc.
    Inventors: Steven G. Roskowski, Elizabeth A. Clough
  • Apparatus for storing data both video and graphics signals in a single frame buffer
    Patent number: 5257348
    Abstract: A computer subsystem for presenting both video and graphic information on a computer output display in a computer system having a central processing unit and a frame buffer including apparatus for providing a video input signal representing full frame of video interlaced data, apparatus for selecting a rectangular portion of the video data to be presented, apparatus for converting the selected portion of the video signal into a stream of digitized pixel signals, apparatus for designating each such pixel of video information which is to be written to the frame buffer, and apparatus for addressing each of such pixels for storage at selected points of the frame buffer.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: October 26, 1993
    Assignee: Apple Computer, Inc.
    Inventors: Steven G. Roskowski, Elizabeth A. Clough, Anthony D. Masterson
  • Apparatus for providing output filtering from a frame buffer storing both video and graphics signals
    Patent number: 5097257
    Abstract: An arrangement which includes apparatus for signifying the source of data to be displayed, apparatus for generating lines of data to fit between the lines of interlaced data to be presented on a non-interlaced output display device, and apparatus for generating lines of data to be presented on an interlaced display from a larger number of lines representing non-interlaced data.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: March 17, 1992
    Assignee: Apple Computer, Inc.
    Inventors: Elizabeth A. Clough, Steven G. Roskowski, Stephen G. Perlman, Anthony D. Masterson