Founded by Werner Siemens (1816-1892) with his brother, Johann George Halske in Berlin, 1847 as Siemens & Halske becoming a stock corporation as Siemens & Halske A.G. in 1897. In 1919, Siemens & Halske with two other German lighting companies formed Osram GmbH KG (Osram a trade name composed from osmium & wolfram. Corporation renamed Siemens A.G. in 1966