Patents by Inventor Kjetil Engvoldsen

Kjetil Engvoldsen 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).

  • Publication number: 20150090532
    Abstract: A collapsible escape ladder, including a first upright, a second upright, and a plurality of elongated rungs that extend between the first and second uprights and that are rotatably attached to the first and second uprights about a first and second rotation axis, respectively, that extend perpendicular to a ladder plane spanned by the first and second uprights and the rungs. The ladder has a closed state where the rungs are substantially hidden between the uprights and an open state where the rungs extend between the uprights and perpendicular to a building wall and wherein the ladder extends downward from an escape point to the ground.
    Type: Application
    Filed: April 15, 2013
    Publication date: April 2, 2015
    Inventor: Kjetil Engvoldsen