Yeah, I probably did. The "personal filter bubble" thing is very much how google does it. I don't know the details about pagerank but I imagine that they are co

Yeah, I probably did. The "personal filter bubble" thing is very much how google does it. I don't know the details about pagerank but I imagine that they are constantly tweaking their secret sauce to increase revenue and that they would rather keep the juicy parts secret than having them described in details in a patent. Also, I'd imagine that other search engines, such as Bing, have developed similar algorithms although I'm sure thay take great care not to infringe upon the pagerank patent. Disclaimer: Purely conjecture on my part. No particular knowledge of patent law, and only a high level understanding of the pagerant algorithm.