The Lego Group world's largest toy company by revenue, with sales amounting to US$2.1 billion, surpassing Mattel, which had US$1.9 billion in sales. On 11 August 2017, Lego announced that Niels B. Christiansen would become the new CEO, effective 1 October of the same year. The history of Lego spans nearly 100 years, beginning with the creation of small wooden playthings during the early 20th century. Manufacturing of plastic Lego bricks began in Denmark in 1947, but since has grown to include factories throughout the world. In 1961, Lego was managed by Samsonite until 1972 in the United States and 1986 in Canada.
The Lego Group Below are historical images of the Lego logo throughout the company's existence. Since the expiration of the last standing Lego patent in 1989, a number of companies have produced interlocking bricks that are similar to Lego bricks. The toy company Tyco Toys produced such bricks for a time; other competitors include Mega Bloks and Best-Lock. These competitor products are typically compatible with Lego bricks, and are often marketed at a lower cost than Lego sets. One such competitor is Coko, manufactured by Chinese company Tianjin Coko Toy Co., Ltd. In 2002, Lego Group's Swiss subsidiary Interlego AG sued the company