Patents by Inventor Francois Keller

Francois Keller 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).

  • Protective equipment for the pilot of a military aircraft, and a method of personalizing the equipment
    Patent number: 5722091
    Abstract: The equipment for military aircraft pilots comprises a helmet (10) having a shell and a visor (18) for placing in front of the eyes. A central portion of the visor is of a shape such that at each point its minimum radius of curvature is substantially in a vertical plane and its maximum radius of curvature is in a plane substantially orthogonal to the preceding plane. The radius of curvature of the visor in the horizontal plane lies in the range 110 mm to 145 mm and its radius of curvature in a vertical plane parallel to the midplane of the helmet varies from about 135 mm in the center to about 75 mm in lateral zones.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: March 3, 1998
    Assignee: Intertechnique
    Inventors: Francois Keller, Fernand Bertheau, Eric Farin