The story
Founded by Johann Georg Halske and Werner von Siemens in 1847.1
After its foundation in 1847, Telegraphen-Bauanstalt von Siemens & Halske specialised in manufacturing electrical telegraphs according to Charles Wheatstone's patent of 1837. In 1848, the company constructed one of the first European telegraph lines from Berlin to Frankfurt am Main. Siemens & Halske was not alone in the realm of electrical engineering. In 1887, Emil Rathenau had established Allgemeine Elektrizitäts-Gesellschaft (AEG), which became a long-time rival.
In 1881, Siemens & Halske built the Gross-Lichterfelde Tramway, the world's first electric streetcar line, in the southwestern Lichterfelde suburb of Berlin, followed by the Mödling and Hinterbrühl Tram near Vienna, the first electrical interurban tram in Austria-Hungary. 1882 saw the opening of the experimental "Elektromote" track, an early trolleybus concept in the Berlin suburb of Halensee. The rising popularity of telegraphs and electrical tramways, as well as in generators and electric motors, ensured steady growth for Siemens & Halske.
Werner von Siemens retired in 1890, while Johann Georg Halske had already left the company in 1867. Werner von Siemens' brother Karl Heinrich, together with Werner's sons Arnold and Georg Wilhelm, grew the firm and erected new Siemens & Halske premises along the banks of the western Spree river, in the Berlin suburb of Charlottenburg, in 1897. The firm's vast new site continued to grow, and from 1899 onwards it was known as Siemensstadt.
From Wikipedia’s article on Siemens & Halske, shared under CC BY-SA 4.0.4