Patents by Inventor DeWayne A. Landwehr

DeWayne A. Landwehr 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).

  • Automotive holographic signal lamp
    Patent number: 5571277
    Abstract: An automotive signal lamp is provided including a lens illuminated by a first light source on a first side, a transmissive hologram adjacent the lens for providing an image when the first light source is activated, and a reflective hologram adjacent the transmissive hologram for providing an image when the first light source is nonactuated and the lens is illuminated by a second light source on a second side of the lens generally opposite the first light source.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: November 5, 1996
    Assignee: General Motors Corporation
    Inventors: Christopher S. Allred, Dewayne A. Landwehr
  • Energy absorbing cellular matrix for vehicles
    Patent number: 4186915
    Abstract: Soft face bumper for vehicles incorporating a resilient energy absorbing cellular matrix molded from a plastic material and having walls of longitudinally extending cells stepped in thickness to provide at least two serially arranged working zones to form a staged energy absorber.
    Type: Grant
    Filed: January 29, 1976
    Date of Patent: February 5, 1980
    Assignee: General Motors Corporation
    Inventors: Gary P. Zeller, DeWayne A. Landwehr