Eleven companies or individuals from China, North Korea or the United Arab Emirates were sanctioned for technology transfers that could boost Tehran's ballistic missile program, the State Department said in a statement.
Nineteen entities or individuals were sanctioned for other violations under the Iran, North Korea and Syria Nonproliferation Act, it said.
They are believed to have transferred or acquired sensitive technology that could contribute to development of weapons of mass destruction.
Reuters is the news and media division of Thomson Reuters.
Thomson Reuters is the world's largest international multimedia news agency, providing investing news, world news, business news, technology news, headline news, small business news, news alerts, personal finance, stock market, and mutual funds information available on Reuters.com, video, mobile, and interactive television platforms.