US based software giant Microsoft has suffered a major legal setback in South Korea. The company has lost a patent-infringement lawsuit in the country and they just might be forced to stop selling its top software products in the country.

Nation’s highest court rejected a request from Microsoft to toss out a patent owned by Professor Lee Keung-Hae of Hankuk Aviation University.

The patent is related to how Microsoft’s Office application does automatic translation between English and Korean in Microsoft Office. It was filed against the country in 2000 by technology firm P&IB representing Professor Lee.

P&IB President Kim Kil-Hae said in a statement on this lawsuit: “Microsoft adapted our technologies to its Office package without dealing with Professor Lee and it claimed the patents were not effective in the court.”