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Events on Tuesday 12 October 1847 1
1847Siemens & Halske foundedWerner von Siemens and Johann Georg Halske start a telegraph company in BerlinWerner von Siemens and the mechanic Johann Georg Halske founded the Telegraphen-Bauanstalt von Siemens & Halske in Berlin. It built pointer telegraphs and grew into one of the world's largest electrical engineering firms.