Patents by Inventor Russell H. Johnson

Russell H. Johnson 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).

  • Method of forming a pipe fitting
    Patent number: 4768369
    Abstract: A method of forming a pipe fitting of unitary construction having a tubular section with a radial flange at one end of the tubular construction. The method includes forming a solid cylindrical bar, upsetting one end of the bar to form a head thereon, drawing the remaining cylindrical portion of the bar to increase its length and decrease its circumference, upsetting the head to form the radial flange, and forming a bore through the flange and remaining cylindrical portion of the bar.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: September 6, 1988
    Inventors: Russell H. Johnson, Larry L. Bobzien