Patents by Inventor Robert W. Pratt, Jr.

Robert W. Pratt, Jr. 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).

  • Flip-flop cable tray walkway
    Patent number: 5042756
    Abstract: Flip-flop cable tray walkway and cable tray with flip-flop walkway system that is movable from above one cable tray to an adjacent cable tray. Movable walkway members mounted to articulation devices can be initially positioned above one cable tray permitting workers to stand thereon while accessing adjacent trays and their contents, the walkway members movable to permit access to the tray on which they are initially positioned or to permit access to trays that are initially too far away for efficient access.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: August 27, 1991
    Assignee: The Dow Chemical Company
    Inventor: Robert W. Pratt, Jr.