Patents by Inventor Anthony D. B. Holderness

Anthony D. B. Holderness 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: 5059970
    Abstract: A navigational aid comprises a housing with a flat, transparent liquid crystal display. The display is flat and flush with the bottom of the housing, to allow the aid to be placed flat on a map or chart. The aid is microprocessor controlled and accepts plug in memory modules, which contain information relating to an area through which a craft, for example, an aircraft, is to be navigated. The display generates cursors which can be superimposed on the map. The aid can display graphically the progress of the craft, superimposed on the map, on the basis of input data supplied by the user. Alternatively, the cursors can be moved to measure the distance beteen points on the map.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: October 22, 1991
    Assignee: Invention Factory (Proprietary) Limited
    Inventors: Dennis A. Raubenheimer, Dan C. Cawood, Geoffrey J. Rawlings, Etienne Rijkheer, Anthony D. B. Holderness