Hewlett-Packard patents granted on 10 February 2015

5 US patents granted on 10 February 2015 and assigned to Hewlett-Packard

1 8,954,893 Visually representing a hierarchy of category nodes
2 8,954,599 Data stream operations
3 8,954,451 Selecting microblog entries based on web pages, via path similarity within hierarchy of categories
4 8,953,199 Method and system to recommend an application
5 8,952,403 Optical devices based on non-periodic sub-wavelength gratings