Microsoft lodges Motorola complaint
Microsoft has lodged a formal complaint with the European Union's competition regulator against Google's Motorola Mobility.
In a blog post, Microsoft's general counsel, Dave Heiner, said: "We have taken this step because Motorola is attempting to block sales of Windows PCs, our Xbox game console and other products."
Mr Heiner said Motorola is unfairly trying to block Microsoft and other companies from using standardised patents it needs for its products to connect wirelessly to the internet.
Google's purchase of Motorola Mobility was the largest acquisition in its history.
When the EU cleared the takeover this month, it indicated concerns over Motorola's aggressive use of patent rights against competitors.
Last week, Apple lodged a similar complaint with the EU against Motorola Mobility.