Patents by Inventor Friedhelm Houpt

Friedhelm Houpt 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).

  • Patent number: 5333431
    Abstract: A flatly shaped roof covering element (1) comprising a plurality of plastic stalks (2) being arranged approximately parallel adjacent to each other and one above the other, their upper end regions (21) being joined together by heat bonding, the stalks (2) having irregular lengths and being irregularly shaped at their free ends (22), and having a helical cross-section, wherein the roof covering element (1) comprises a layer of paper (3, 3') on both sides of the bonded upper region (21) of the stalks (2), the paper being bonded thereto, wherein the bonded upper region is not flat.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: August 2, 1994
    Inventor: Friedhelm Houpt