Havemeyer rebar
Bars are deformed in a manner that does not change the net cross sectional area along the length, thus producing a bar where the entire cross sectional area all along the bar carries the tensile load. These bars weigh less per foot than other bars of equivalent strength.
Patent from 1909:
https://patents.google.com/patent/US1151947A/en
Sold by The Concrete Steel Company of New York
Bridgeport Lamp Chimney Co. Bridge (Harrison County, West Virginia)
Built 1924 by Bridgeport Lamp Chimney Co.;Concrete through arch bridge over Simpson Creek on Pedestrian WalkwayOpen to pedestrians
Stillhouse Road culvert (Jackson County, Missouri)
Concrete culvert bridge over Tributary of Sni-A-Bar Creek on S Stillhouse RdOpen to traffic