Yahoo patents granted on 30 July 2013

4 US patents granted on 30 July 2013 and assigned to Yahoo

1 8,499,032 System and method for compiling a set of domain names to recover
2 8,499,008 Mixing knowledge sources with auto learning for improved entity extraction
3 8,498,978 Slideshow video file detection
4 8,498,950 System for training classifiers in multiple categories through active learning