Seamless Tube Industry
A block away was the plant in which Ralph C. Stiefel, the Swiss-born engineer, invented the rotary piercing process for making steel tubing, 1895. He helped found Ellwood Weldless Tube Co., which became a nucleus for the National Tube Div. of U.S. Steel.
Marker is at the intersection of East Lawrence Avenue (Pennsylvania Route 351) and Seventh Street, on the right when traveling east on East Lawrence Avenue.
Courtesy hmdb.org
