Patents by Inventor David W. Houghton

David W. Houghton 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).

  • Stretch reduction mill
    Patent number: 6128934
    Abstract: A method and apparatus that provides a multiple-stand stretch reduction mill. A single master controller monitors and controls the roll speed at each roll stand in the mill, automatically and simultaneously maintaining each stand's roll speed at a pre-determined, calculated roll speed.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: October 10, 2000
    Assignee: Lone Star Technologies, Inc.
    Inventor: David W. Houghton