Patents by Inventor Roger Duchenaud

Roger Duchenaud 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).

  • Cylinder for reproducing raised patterns on all surfaces
    Patent number: 4050409
    Abstract: An apparatus for imparting a relief effect to patterns on even surfaces. A cylinder is formed by winding upon itself a thick metal sheet which is provided with holes therethrough. A doctor permits the depositing of a coat of a colorless varnish onto the surface to be coated when the surface is translated linearly relative to the rotatable cylinder.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: September 27, 1977
    Inventors: Alain Duchenaud, Roger Duchenaud