Patents by Inventor Leslie T. Keown

Leslie T. Keown 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).

  • Collapsible fire escape ladder with anti-tip restraint seat
    Patent number: 6029771
    Abstract: A collapsible fire escape ladder with an anti-tip restraint seat. The anti-tip restraint seat is attached tD the bottom end of the collapsible ladder and is used to safely lower a person from the upper floor of a building to eliminate the need for carrying the person while descending the collapsible ladder.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: February 29, 2000
    Inventor: Leslie T. Keown