Microsoft is ranked 4th in the list of patent leaders. It won 2,030 patents in 2008
Many of Microsoft's applications for patents have raised.
Microsoft has been criticised for applying for patents of pre-existing technologies.
In 2006, Microsoft Corp hit a patent milestone by logging its 5,000th patent granted in the United States.
Image: Microsoft India Development Center in Hyderabad. | Photograph: Rediff Archives
Also read: 'It is very hard to replace Bill Gates'
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