Nokia said it had filed a complaint in the Federal District Court in the Western District of Wisconsin, alleging that Apple's iPhone and iPad 3G products infringe five important Nokia patents.
The patents have not been covered in Nokia's previous actions against Apple. The two are in the midst of a major legal battle, which started last October when Nokia charged Apple for using its patented technologies without paying for them.
The patents in question relate to technologies for enhanced speech and data transmission, using positioning data in applications and innovations in antenna configurations that improve performance and save space, Nokia said.
These patented innovations are important to Nokia's success as they allow improved product performance and design, it said.
(Reporting by Brett Young; Editing by Erica Billingham)
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