Patents by Inventor Franz Andrae

Franz Andrae 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).

  • Device to shield against an electromagnetic field
    Patent number: 4891468
    Abstract: Device to shield against an electromagnetic field, consisting of a shielding film made of metal, in particular aluminum or metallized plastic which is provided with openings, the shielding film having an essentially hexagonal outline and being subdivided into six triangular fields by ridges connecting the corners to the center of the film and the openings consisting of slits which are parallel to the hexagon side of each triangular field and to each other and extend over the entire triangular field (FIG. 1).
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: January 2, 1990
    Inventor: Franz Andrae