Patents by Inventor Kelly Maureen Sorgenfrey

Kelly Maureen Sorgenfrey 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).

  • Automatic railing for a retractable stairway
    Patent number: 11007944
    Abstract: An upper rail assembly, an actuator that actuates between a retracted position and an extended position based on a signal that the platform is in one of a retracted position and an extended position with respect to the recreational vehicle, and a first drive chain combined to the actuator and connected to the upper rail assembly for moving the upper rail assembly between a retracted position and an extended position with respect to the platform is disclosed.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: May 18, 2021
    Inventors: Paul Edmund Hanser, Kelly Maureen Sorgenfrey