Patents by Inventor John T. Roberson

John T. Roberson 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: 5696947
    Abstract: A two dimensional frame buffer memory interface structure is provided. The interface comprises a parallel data bus, a control signal bus, a data cache, and a controller. The parallel data bus transfers a set of pixel data in parallel to the data cache. The control signal bus transfers to the controller a X strobe signal, a Y strobe signal, and a mode signal indicating an interface mode specifying a designated pattern for the pixel data transferred over the parallel data bus. The data cache, controlled by the controller and connected to the parallel data bus, compiles each set of pixel data received over the parallel data bus into the designated pattern of pixels, as indicated by the mode signal.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: December 9, 1997
    Assignee: International Business Machines Corporation
    Inventors: Charles R. Johns, John T. Roberson