Patents by Inventor Charles Gregersen

Charles Gregersen 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: 8011473
    Abstract: A stepladder comprises a front frame and a rear frame each formed of a pair of spaced side rails. A motor-driven step is slidably mounted on the front frame side rails. The motor is controlled with a remote unit allowing a worker to automatically raise and lower the step when accessing an elevated area.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: September 6, 2011
    Inventor: Charles Gregersen