Claim: Herrenknecht AG, founded in 1975 by Martin Herrenknecht in Schwanau, a town in the district of Ortenau in Baden-Württemberg in Germany, is a private (AG) company in the heavy equipment and geotechnical engineering industry with tunnel boring machine products.
Evidence: Martin Herrenknecht established the Martin Herrenknecht engineering company in 1975. The company manufactures tunnel boring machines, headquartered in Allmannsweier, Schwanau, Baden-Württemberg. It is the worldwide market leader for heavy tunnel boring machines. Heavy equipment
Geotechnical engineering Private (AG) 
Private (AG) Heavy equipment
Geotechnical engineering 1975 Martin Herrenknecht Schwanau, Germany Tunnel boring machines The company manufactures tunnel boring machines, headquartered in Allmannsweier, Schwanau, Baden-Württemberg.