Yahoo patents granted on 25 November 2014

4 US patents granted on 25 November 2014 and assigned to Yahoo

1 8,898,575 Indicating unavailability of an uploaded video file that is being bitrate encoded
2 8,898,133 User behavior-driven background cache refreshing
3 8,897,498 Mobile imaging device as navigator
4 8,896,604 Producing optimization graphs in online advertising systems