Patents by Inventor David W. Oplt

David W. Oplt 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).

  • Patent number: 4428320
    Abstract: An inexpensive reflective paving marker, which may be used to delineate traffic lanes in construction zones, and is especially useful at night and during wet conditions, has a light weight molded plastic support structure and a reflective element composed of a thin strip of reflective polycarbonate tape. The tape is placed on a surface that is inclined to reflect incident light, such as the light from automobile headlights. The surface on which the reflective tape is mounted has a slight recess to protect the tape from the abrasive effects of traffic, such as automobile tires, to retain the reflective properties of the structure. The support structure has recesses in the bottom which provide additional grip in an adhesive, such as an epoxy or a butyl sheet, which secures the structure in place. Nails or other fasteners may also be used to secure the marker; the support structure has preformed guide holes for fasteners.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: January 31, 1984
    Assignee: Lukens General Industries, Inc.
    Inventors: David W. Oplt, Fred G. Peil