Patents by Inventor Paul K. Stephenson

Paul K. Stephenson 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 of mapping geometric entities from a continuous plane to a discrete plane
    Patent number: 4991115
    Abstract: A method for generating mask transparencies for the mass production of printed circuit boards using a laser photoplotting system includes an algorithm for mapping geometric entities from the continuous plane such as is used in vector photoplotting to a pixel graphic representation of the geometric entities. The method reduces offset errors between rectangular entities and circular entities in phototool primitives constructed in the discrete pixel graphic system by selecting a pixel to represent the corner of the rectangular entity that is closest to the circumference of the circular entity.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: February 5, 1991
    Assignee: Excellon Industries, Inc.
    Inventors: Thomas L. Guthrie, Paul K. Stephenson