Promotional Technologies LLC v. Facebook, Inc. et al.
United States District Court, Northern District of Texas
Case No. 3:11-cv-03488, Filed December 15, 2011

This case was terminated on October 25, 2013. All claims and counterclaims were dismissed with prejudice subject to a settlement agreement dated October 18, 2013.

Promotional Technologies sued Facebook and Zynga for patent infringement.  Promotional alleged that Facebook and Zynga infringed its patent through their games Farmville, MafiaWars, and other online games offering virtual prizes. The patent-in-suit is U.S. Patent 6,749,511  and it relates to an online game designed to promote websites through a host website that launches the promotional applet. The purpose of the system is to promote websites by encouraging users to revisit them by offering prizes.

The original post of the case is located here.

Historical Interlude: The Magnavox Co. v. Mattel, Inc.
"Happy Birthday to You" in public domain