Patents by Inventor David S. Haghiri

David S. Haghiri 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).

  • High strength steel tubing
    Patent number: 6518533
    Abstract: High strength steel tube is made from a full hard, cold rolled steel sheet having a chemistry compliant to S.A.E. J 403 grade 1026. The high strength of the tube is a result of specified thermal-mechanical processing of hot rolled sheet followed by controlled percent cold rolled reduction, and does not require post-welding thermal heat treatment and/or cold drawing processing.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: February 11, 2003
    Assignee: LTV Steel Company, Inc.
    Inventor: David S. Haghiri