Elektrotechnická a. s., formerly Kolben a spol., was a company based in Prague-Vysočany. It was active in car building between 1900 and 1901 and again in 1907. The company made two electric cars in cooperation with the NW firm of Kopřivnice. NW supplied chassis of the Vierer type at a price of 5,200 Austrian crowns. The cars were four-seat open vehicles with a carriage-style body and a folding roof.