Patents by Inventor Douglas B. Mackley

Douglas B. Mackley 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).

  • Concrete beam conduit guide
    Patent number: 5245806
    Abstract: A concrete beam conduit guide includes a hollow open ended prismatic body with a downwardly sloping roof, an upward sloping floor, sidewalls and seal flanges at the open ends of the body.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: September 21, 1993
    Assignee: High Industries, Inc.
    Inventors: Kenneth C. Baur, Douglas B. Mackley