Yahoo has sued Facebook for patent infringement and claims that the dominant social network has founded its success on Yahoo's 'patented social networking technology.'
Yahoo's lawsuit reckons Facebook has infringed on around 10 of its patents and challenges Facebook's right to use of the Newsfeed feature, social commenting, certain advertising features, messaging, website personalisation and more.
After issuing a strongly worded statement, the free-falling internet giant says it wants damages to prevent Facebook using the tech. It is also thought that the pair were in talks over licensing the patents, but those talks broke down.
Yahoo says: "Yahoo's patents relate to cutting edge innovations in online products, including in messaging, news feed generation, social commenting, advertising display, preventing click fraud and privacy controls.
"Facebook's entire social network model, which allows users to create profiles and connect with, among other things, persons and businesses, is based on Yahoo's patented social networking technology."
With the worlds leading smartphone companies currently suing the bejesus out of each other, it seems other sectors of the tech industry are keen for a nice bit of courtroom action. Facebook, of course, has denied the allegations.