First Nokia sued Apple. Then Apple sued Nokia. Last week, Nokia went to the International Trade Commission and requested a ban on the import of infringing Apple products. Today, Apple asked ITC to ban the import of infringing Nokia products.
This game of patent-infringement ping pong dates back to October, when Nokia first sued Apple for violating 10 patents, including holdings related to GSM, UMTS and wireless LAN. About a month and a half later, Apple countersued, claiming that Nokia was attempting to steal their technology. Since then, both sides have filed further lawsuits claiming further patent violations of various sorts.