Patents by Inventor Robert A. Gemin

Robert A. Gemin 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).

  • Combined radar/barometric altimeter
    Patent number: 4431994
    Abstract: An altitude sensing arrangement which combines the advantages of a barometric altimeter with a radar altimeter. The apparatus monitors the radar altimeter's associated radar validity signal and selects the radar altimeter's reading when the validity signal indicates a valid condition. Alternately, when the validity signal does not indicate a valid condition, the invention computes the difference in barometric altitude since the last valid radar altimeter reading and sums this difference with the last valid reading from the radar altimeter to produce a combined altitude reading.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: February 14, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Robert A. Gemin