Patents by Inventor Timm J. Timmermann

Timm J. Timmermann 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).

  • Adjustable extension stepladder
    Patent number: 5590739
    Abstract: A motorized utility extension ladder having a main and upper riser section extendable by a motor. The ladder further comprising a telescopic prop so that the ladder may be free standing, side wing legs for stabilizing the ladder, wheels for transporting the ladder, and a removable shelf.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: January 7, 1997
    Inventors: DeWayne A. High, Timm J. Timmermann