ponyboy96 - 7:50 pm on Aug 21, 2012 (gmt 0)
I think this was something that has been around for a while (even though the patent is new). Used to be you linked to deeper important pages you were trying to get to rank from the homepage. It was an old SEO trick that I think got discounted or lost in the shuffle (at least for me) a long time ago. The idea was to flow more PR to that page since the homepage had the most authority and highest PR on the site.