Early on he recognised the opportunities in the electrical industries and delivered special wire for the Post to use for telegraph and telephone.
Berg founded as subsidiaries the copperworks "Deutschland" in Berlin and "Österreich" in Außig (part of Cavertitz, in Bohemia).
[1] By the end of 1897 Ferdinand Graf von Zeppelin had discussed possible airship design with Berg, and together with Philipp Holzman in May 1898 they formed the joint stock company Gesellschaft zur Förderung der Luftschiffart.
[2] After building the first Zeppelin in a floating hangar on Lake Constance and executing three test flights, the shareholders were reluctant to invest more and the company was liquidated in 1900.
Berg also produced duralumin, an alloy with copper, manganese and magnesium invented by Alfred Wilm.