tangor - 9:05 pm on Feb 28, 2012 (gmt 0)
The web firm is trying to persuade Facebook to license ten to 20 of its patents that deal with advertising, personalisation of web pages, social networking and messaging, people briefed with the matter leaked to the New York Times.
The two companies were apparently chatting about the issue on Monday, when Yahoo! told Facebook that the social network was infringing these patents and it better pay up or Yahoo! would see it in court! Or words to that effect.