Patents by Inventor William R. Mehrtens

William R. Mehrtens 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).

  • Visual descent sighting device for aircraft
    Patent number: 4034480
    Abstract: This invention relates to a self-contained sighting device for use in aircraft that will give visual descent guidance to the pilot while making his final approach to a runway for a landing. The device comprises frames or windows that sight along an imaginary approach path which automatically directs the pilot's line of sight to parallel the desired approach path thereby aiding the pilot in his approach to the intended landing spot.
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: July 12, 1977
    Inventor: William R. Mehrtens