Microsoft announced that it is suing GPS device vendor TomTom for infringing as many as eight of the software giant's patents. It is also asking a U.S. trade body to get involved to halt sales.

In a brief statement, Horacio Gutierrez, Microsoft deputy general counsel of intellectual property and licensing, said Microsoft had tried to negotiate with TomTom with no luck.

"We have taken this action after attempting for more than a year to engage in licensing discussions with TomTom," Gutierrez's statement said.

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