The defendant, Yu Long, 36, is a Chinese citizen and a permanent resident of the United States who lived in New Haven.
He was arrested November 7 at an Ithaca, New York, home, two days after he allegedly attempted to fly to China from Newark, New Jersey, with proprietary material. The criminal complaint was unsealed yesterday at a court hearing in Bridgeport.
Long's attorney didn't immediately respond to a message seeking comment.
"UTC is fully cooperating with the government's investigation. Because it is an ongoing investigation, we have no comment at this time," company spokesman John Moran said.
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Investigators say that upon returning from a trip to China in August, Long was found by screeners at an airport in New York to be carrying a nearly completed application for work with a state aerospace research center in China. It described experiences at UTC including work on engines used by US Air Force fighter aircraft.
Long is charged with transporting, transmitting and transferring in interstate or foreign commerce goods obtained by theft or fraud.