Apple on Friday said it had launched a countersuit against the world’s largest cellphone maker, Nokia. According to Apple, Nokia is infringing on 13 of its patents. Apple’s lawyer was very blunt in his statement concerning the case.

“Other companies must compete with us by inventing their own technologies, not just by stealing ours,” said Bruce Sewell, Apple’s General Counsel and senior vice president.

Nokia sued Apple for patent infringement in October, claiming it had infringed its patents. The patents cover wireless data, speech coding, security and encryption and are infringed by all Apple iPhone models shipped since the iPhone was introduced in 2007, claims Nokia.