Patents by Inventor David E. Stevens

David E. Stevens 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).

  • Artificial horizon altitude warning system
    Patent number: 5486821
    Abstract: An artificial horizon altitude warning system is provided for helping to prevent a controlled flight of an aircraft into the ground. The artificial horizon altitude warning system comprises an altimeter for gathering altitude information about the aircraft and generating an altitude signal; a laser assembly for producing a light in a cockpit of the aircraft; and a controller for receiving the altitude signal and for positioning the light in the cockpit to form an artificial line based on the altitude signal, the artificial line being positioned so as to be disposed along tin arcuate length corresponding to the location of an actual horizon as viewed by a pilot of the aircraft.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: January 23, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David E. Stevens, Leonard A. Temme