Patents by Inventor James O. Carlson

James O. Carlson 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).

  • Screed extender with berm-forming screed
    Patent number: 4818140
    Abstract: A screed assembly has two screed sections hingedly connected together at meeting beveled ends. The hing between the screed sections maintains a hinge axis at the soles thereof as one of the screed sections is swung upwardly to define a sloped face for a berm alongside a paving mat as a paving machine with the screed assembly progresses to form the berm and paving mat simultaneously.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: April 4, 1989
    Inventor: James O. Carlson