Patents by Inventor Stephen B. Willan

Stephen B. Willan 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).

  • Computer graphics system electronically simulating painting on canvas
    Patent number: 5239292
    Abstract: A graphics system comprises an input device, and a computer for detecting changes in the position of the input device relative to a surface, and a monitor (63) for displaying patterns which follow the movement of the input device. The computer calculates at least one differential derivative with respect to time of the input device position and controls characteristics of the display patterns in dependance upon the or each calculated derivative.
    Type: Grant
    Filed: August 1, 1991
    Date of Patent: August 24, 1993
    Assignee: Crosfield Electronics Ltd.
    Inventor: Stephen B. Willan