Yahoo has demanded Facebook license as many as 20 of its technology patents or face a lawsuit.
The technology patents held by Yahoo include advertising, website personalization, social networking and messaging, the New York Times' Dealbook reported. Yahoo is asking Facebook to pay up or possibly face patent infringement lawsuit.
“Yahoo has a responsibility to its shareholders, employees and other stakeholders to protect its intellectual property,” a Yahoo spokesman said in an e-mailed statement. “We must insist that Facebook either enter into a licensing agreement or we will be compelled to move forward unilaterally to protect our rights.”