According to The Verge, the lawsuit is saying Facebook is using in its messaging apps functions that infringe on BlackBerry messaging app patents. In its 117-page complaint, the software company says Facebook is “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.” The patents cover a wide range of messaging features including time stamps and unread messages count. Facebook Deputy General Counsel Paul Grewal, said: Blackberry’s suit sadly reflects the current state of its messaging business. Having abandoned its efforts to innovate, Blackberry is now looking to tax the innovation of others. We intend to fight.