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 National Tube Div. of U.S. Steel.
USGS Historical Topographic Map CollectionDavid Rumsey Map Collection, Stanford LibrariesUSGS Historical Topographic Map CollectionUSGS Historical Topographic Map CollectionDavid Rumsey Map Collection, Stanford Libraries
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
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