Ludwig Stuckenholz
1830 Ludwig Stuckenholz, a talented journeyman at Mechanische Werkstätte, set up on his own with the support of Friedrich Harkort, at Wetter Castle.
1867 Rudolph Bredt joined Stuckenholz in Wetter after his training as an engineer in England. He became the successor to Ludwig Stuckenholz.
1906 Märkische Maschinenbauanstalt and Ludwig Stuckenholz merged to form Märkische Maschinenbauanstalt Ludwig Stuckenholz AG.
The major competitors in the field merged to form Deutsche Maschinenfabrik AG. The driving force was Märkische Maschinenbauanstalt Stuckenholz AG, managed by Wolfgang Reuter; the other two partners are Duisburger Maschinenbau and Benrather Maschinenfabrik. The firm became known as DEMAG.
The above information is condensed from here[1]