Apple Inc. is suing cell phone maker Nokia Corp. for patent infringement, a countermove to Nokia's earlier lawsuit against technologies used in Apple's iPhone.
Apple's lawsuit claims Nokia is infringing on 13 of Apple's patents and says the Finland-based company chose to "copy the iPhone," especially its user interface, to make up for its declining share of the high-end phone market.
Nokia's lawsuit, filed in October, claims that Cupertino, Calif.-based Apple infringes on 10 of its patents covering phone calls and Wi-Fi access.
The patents Apple alleges Nokia is infringing deal with, among other things: connecting a phone to a computer, teleconferencing, menus on a touch screen, power conservation in chips, and "pattern and color abstraction in a graphical user interface." The company also denies Nokia's claims of patent infringement.
In a written statement, Nokia says it will review the claims and respond "in due course."
Apple said Nokia fell behind in the smart-phone market because it chose to focus on old-fashioned cell phones with conventional user interfaces at a time when smart phones were growing increasingly popular.
Countersuits are a staple of patent litigation, which often ends in cross-licensing agreements.
Nokia said in October that 40 phone manufacturers - not Apple - have licensed the patents cited in its lawsuit.
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