Jones and Laughlin Steel Company
The Jones and Laughlin Steel Corporation, also known as J&L Steel or simply as J&L, was an American steel and iron manufacturer that operated from 1852 until 1968. The enterprise began as the American Iron Company, founded in 1852 by Bernard Lauth and Benjamin Franklin Jones, about 2.5 mi (4.0 km) south of Pittsburgh along the Monongahela River.
Source: Wikipedia — Jones and Laughlin Steel Company (CC BY-SA 4.0)