Today on this March 6, 2018, this Reuters article [reuters.com] describes:
March 6 (Reuters) - BlackBerry Ltd on Tuesday filed a patent infringement lawsuit against social media platforms Facebook Inc and its units WhatsApp and Instagram.
BlackBerry said Facebook and its companies developed “competing applications that improperly used BlackBerry’s mobile messaging intellectual property”.
[ . . . rest omitted . . . ]
How fitting it is that today is the 15th anniversary of the SCO vs IBM lawsuit.