Nokia's patent war with Apple escalated yesterday, as the Finnish-based manufacturer filed 13 more infringement claims against the technology giant.
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Nokia now accuses Apple of infringing 37 patents, including technology for touchscreen development.
Nokia's latest move included filing claims in courts in the UK, Germany and Holland. Its legal action started against Apple in October 2009, with earlier claims in Delaware and Wisconsin involving alleged patent infringements of 3G and Wi-Fi technology.
Nokia said some of the patents had been filed ten years prior to the launch of the iPhone.
A spokesman from Nokia said he expected the legal process to be lengthy: "We would expect it to come to trial in 2011/2012. Clearly we are confident about our position, the patents filed are just a small selection of our entire patent portfolio and the results of two decades of R&D investment worth €40bn," he said.
Apple has countersued Nokia over patents in the US and the UK. The company is also embroiled in patent rows with Motorola, HTC and other mobile phone vendors using Google's Android operating system.
Apple has so far declined to comment.