Nokia first accused Apple’s iPhone of patent infringement last October. But once the iPad went international, Nokia complained to a federal court in Wisconsin that the tablet computer, too, uses Nokia’s intellectual property. The Finland-based company further added five patents to its allegations. Nokia said those relate to enhanced speech and data transmission, applications data-positioning and antenna configurations.
“These patented innovations are important to Nokia’s success as they allow improved product performance and design,” Nokia said in a prepared statement.
Nokia is the world’s largest handset maker but the popularity of the Apple iPhone could threaten that ranking.
Apple has denied the iPhone patent-infringement allegations, countersuing Nokia in the process, and has yet to comment on the latest accusations.
Shares of both companies were down in late-morning trading, although that could be attributable more to the European debt crisis and Thursday’s unexplained stock plunge than to the lawsuit.