Yahoo files massive lawsuit against Facebook over patent infringement

Yahoo sued Facebook, accusing the social media giant of infringing 10 patents. According to the lawsuit, Facebook copied Yahoo's products, including advertising, privacy controls, social networking and messaging.

The company said it made innovations in social networking with products like Yahoo Groups, Yahoo 360, Yahoo Mash and Yahoo Pulse. The lawsuit alleges that Facebook infringed a Yahoo patent with its News Feed feature, a running stream of friends' activities. The lawsuit also claims that Facebook copied Yahoo's advertising features and its privacy controls. The suit asks the court to order Facebook to pay triple the damages it allegedly caused to Yahoo "in view of the willful and deliberate nature of the infringement."