WALTHAM, Mass.--(BUSINESS WIRE)--Thermo Fisher Scientific Inc. (NYSE: TMO), the world leader in serving science, reported that revenues decreased 2% to $2.53 billion in the third quarter of 2009, compared with $2.59 billion in the 2008 quarter. These results reflect the impact of foreign currency translation, which lowered revenues by 2%, and acquisitions, which increased revenues by 2%. GAAP diluted earnings per share (EPS) were $.53 in 2009, versus $.50 in the year-ago period. GAAP operating income for the 2009 quarter was $275 million, compared with $286 million in 2008, and GAAP operating margin was 10.9%, compared with 11.1% a year ago.