Patents by Inventor Ian T. B. Blackie

Ian T. B. Blackie 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: 4768028
    Abstract: The apparatus includes alignment means (13, 14) for determining the direction of a sight-line (12) extending from an observer (11) to a display surface (10), projection means (15, 16) for projecting an image of a graticule into the sight-line for movement therewith, and control means (17) operable to cause the display of a movable cursor on the display surface (10) when the sight-line (12) intersects the display surface.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: August 30, 1988
    Assignee: Ferranti plc
    Inventor: Ian T. B. Blackie