Yahoo patents granted on 01 April 2014

4 US patents granted on 01 April 2014 and assigned to Yahoo

1 8,689,330 Instant messaging malware protection
2 8,689,136 System and method for backend advertisement conversion
3 8,688,670 System and method for dynamically retrieving data specific to a region of a layer
4 8,688,521 System and method to facilitate matching of content to advertising information in a network