Patents by Inventor Robert B. Quates

Robert B. Quates 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).

  • Barrier
    Patent number: 6244324
    Abstract: A barrier extendable and retractable beneficially in response to a changing environment of use, is disclosed. In use, the barrier is attached at its ends to support surfaces. An extension and retraction mechanism for the barrier beneficially exerts substantially constant force regardless of the barrier extent. In a preferred embodiment, a ball screw, an axially movable ball screw nut, and gas springs are used.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: June 12, 2001
    Assignee: Total Retraction Inc.
    Inventors: Robert B. Quates, David P. Ketcham