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Post-WWI Siemens entered into a number of joint ventures in the field of light bulb production (Osram) and the manufacture of radio equipment.
1925 Siemens-Reiniger Verfa Co was formed
1932 Company formed to bring together in one unit all of Siemens medical equipment products
1934 Began to market a mobile X-ray unit
Early 1930s the company was also involved in the development of the first telex network in Germany.
WWII 80 per cent of the assets of Siemens was lost as a consequence of war damage and occupation in Germany, and confiscation of assets abroad
1966 Siemens AG was formed, bringing together Siemens and Halske AG, Siemens Schukertwerke and Siemens-Reiniger-Werke, to respond to changes in technology and in the global markets for electrical technology.