The patent disagreement between FB and yahoo was brought to an end, only to bring about an advertisement alliance. Yahoo brought the suit in March claiming 10 of its intellectual properties to be infringed. Subsequently FB bought 750 patents from IBM and countered. Later it bolstered defense with patents from Microsoft.
The firms came to a resolution and decided to collaborate.
- Facebook-Yahoo ‘patent row ends’ (bbc.co.uk)
- Yahoo, Facebook strike patent truce, ad alliance (ibnlive.in.com)