Patents by Inventor Mark R. Schlueter

Mark R. Schlueter 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).

  • Foldable ladder
    Patent number: 6457559
    Abstract: A foldable ladder having two rails with several rungs pivotally mounted on each end to rail extensions. The rail extensions are fixed to the rails and extend towards each other. A pivot joint in each rail extension connects a common rung to allow the rung to be pivoted on two of its ends. To prevent the normally pivotally joined rungs from moving when the ladder is in an opened position, a bracket is slidably mounted on the top and bottom ladder rungs.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: October 1, 2002
    Inventors: Mark R. Schlueter, Tami Lee Schlueter