Nokia broadened its patent fight with Apple on Friday to include the iPad 3G.

The company today filed a complaint against Apple with the Federal District Court in the Western District of Wisconsin, alleging that Apple iPhone and iPad 3G products infringe five Nokia patents.

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, allowing smaller and more compact devices.

"Nokia has been the leading developer of many key technologies in mobile devices" said Paul Melin, General Manager, Patent Licensing at Nokia. "We have taken this step to protect the results of our pioneering development and to put an end to continued unlawful use of Nokia's innovation."

Nokia claims that it has invested approximately EUR 40 billion in research and development and built one of the wireless industry's strongest and broadest IPR portfolios, with over 11,000 patent families. On the other hand, Apple is also a very tech-rich companies with tremendous IP. As a result, the scenario of seeing both companies "borrowing" each others' technology to some extent through cross-licensing agreements is possible.