| Bernard Lauth | |
| Birth Date: | August 23, 1820 |
| Birth Place: | Obersteinbach, Bas-Rhin, Grand Est, France |
| Death Place: | near Howard, Pennsylvania in Centre County |
| Known For: | cold rolling |
| Occupation: | inventor |
| Spouse: | Elizabeth Wilhelm |
| Parents: | Bernard Lauth and Catharina Barbara Dauenhauer |
Bernard Lauth (August 23, 1820 in Alsace, France[1] – June 25, 1894) founded the American Iron Works in 1850 and formed a partnership with B.F. Jones in 1851.[2] In 1854, Lauth retired from the steel firm, selling his partnership to James H. Laughlin, who led the company to be renamed Jones and Laughlin Steel Company.[3] He invented and patented the process for cold rolling of iron in 1859.[4] In 1871, he purchased the iron furnace at Howard, Pennsylvania, where he built a rolling mill in 1882.