Patents Assigned to Smith Pipe and Steel Co.
  • Lintel structure
    Patent number: 4020612
    Abstract: A lintel fabricated of an elongated lightweight metal plate having rigidifying beam means affixed thereto and extending longitudinally thereof.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: May 3, 1977
    Assignee: Smith Pipe and Steel Co.
    Inventor: William T. Welch