Complex sentence: In 1979, the company entered the United States market by purchasing Haughton Elevator; a decade later, Schindler assumed control of the North American escalator/elevator operations of Westinghouse, forming Schindler's American division.
Split into simpler sentences: In 1979, the company entered the United States market by purchasing Haughton Elevator. A decade later, Schindler assumed control of the North American escalator/elevator operations of Westinghouse, forming Schindler's American division.