Patents by Inventor Donald J. Cier

Donald J. Cier 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).

  • Box culvert without rib stiffeners
    Patent number: 5118218
    Abstract: A corrugated box culvert constructed from reinforced corrugated steel or aluminum sheets having very deep corrugations and generally having a uniform bending moment profile for the whole length of the culvert.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: June 2, 1992
    Assignee: Syro Steel Company
    Inventors: Samuel C. Musser, Donald J. Cier