29827035 story Yahoo Unfriends Facebook With Aggressive Patent Demands 59 Posted by timothy on Tuesday February 28, 2012 @11:50AM from the press-1-to-pay-press-2-to-be-sued dept. theodp writes "'Hate to see something happen to that multi-billion IPO of yours,' is essentially the IPO-threatening message Yahoo sent to Mark Zuckerberg and Facebook investors on the eve of the social networking giant's IPO. Yahoo, unlike the Sopranos, is using IP as its muscle to collect its IPO-protection money: 'We must insist that Facebook either enter into a licensing agreement [for 10-20 Yahoo-owned patents] or we will be compelled to move forward unilaterally to protect our rights,' Yahoo explained in a statement alerting the NY Times to its demand. Yahoo issued a similar last-minute threat to Google on the eve of its 2004 IPO, prompting Google to pony up 2.7 million shares to settle Yahoo's patent lawsuit. BTW, should Facebook also be concerned that Amazon has been beefing up its PlanetAll social networking patents from the '90s, including the one issued Tuesday covering a Social Networking System Capable of Notifying Users of Profile Updates Made by Their Contacts?"