Nokia has announced that it has filed a lawsuit against Apple in Federal District Court in Wisconsin’s Western District. The phone and portable electronics company is claiming that the iPhone and iPad violate five of their patents.

“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,” said Paul Melin, Nokia’s general manager for patent licensing.

The various patents in question (that vary from data positioning, speech transmission to antenna configurations) are related to making portable devices more compact. This marks the latest legal clash between Apple and Nokia, with Nokia having asserted Apple violated 10 of its patents last year and Apple counter-suing and charging Nokia with violating 13 of its patents.