Blackberry sues Facebook for messaging patent 'theft'

Apps like Facebook, Instagram and WhatsApp use some messaging capabilities that were originally designed by BlackBerry, a spokeswoman for the company said in an email. "We have a strong claim that Facebook has infringed on our intellectual property, and after several years of dialogue, we also have an obligation to our shareholders to pursue appropriate legal remedies."

BlackBerry is asking that Facebook be ordered to stop providing its primary app as well as Facebook Messenger, Workplace Chat, WhatsApp Messenger and Instagram applications and websites.

Facebook and its companies "created mobile messaging applications that co-opt BlackBerry's innovations, using a number of the innovative security, user interface, and functionality enhancing features that made BlackBerry's products such a critical and commercial success in the first place," BlackBerry said in a complaint.

"BlackBerry's suit sadly reflects the current state of its messaging business," said Paul Grewal, Facebook's deputy general counsel. "Having abandoned its efforts to innovate, BlackBerry is now looking to tax the innovation of others. We intend to fight."

In the past, Facebook executives have explained that in the technology industry, copying what works is sometimes necessary. Facebook wasn't the first social network, just like Google's Gmail wasn't the first email service.

Facebook has publicly credited Snapchat for creating the popular "stories" function that allows people to post disappearing videos about their days, which is now more popular on Facebook's properties than it is on Snapchat.