Facebook Buys 750 IBM Patents as Yahoo's Patent Infringement Lawsuit Looms
March 26, 2012 - Facing a patent lawsuit filed against it by Yahoo, Facebook bought 750 patents from IBM to boost its portfolio. The patents are said to cover software and networking.
Prior to this purchase and the Yahoo lawsuit, Facebook also acquired patents from Hewlett-Packard and Friendster. It also has 56 issued patents and 503 filed patent applications.