Swedish inventors are Swedish people who invented novel ideas, machines or tools. In the 18th century Sweden's scientific revolution took off. Previously, technical progress had mainly come from professionals who had immigrated from mainland Europe. In 1739, the Royal Swedish Academy of Sciences was founded, with people such as Carl Linnaeus and Anders Celsius as early members. Sweden has a total of 49,974 patents as of 2015 according to the United States Patent and Trademark Office, and only ten other countries have more patents than Sweden.