From Salon.com.
Twenty-five percent of the technology and engineering companies started in the United States between 1995 and 2005 had at least one key co-founder who was an immigrant, reports a new study from researchers at the Pratt School of Engineering at Duke University. The researchers estimate that these companies generated $52 billion in sales and employed 450,000 workers. Immigrant non-citizens were also responsible for 24 percent of all international patent applications filed from the U.S. in 2006. Indians alone started more engineering and technology companies in the U.S. in the last 10 years than Chinese, Taiwanese and Japanese combined.