PageRank, Oldest And Latest Patents

Bill Slawski points us to a new patent on PageRank issued to Stanford University, as well as what he believes is the very first PageRank patent. Comparing the two, Slawski's writes Stanford's patent seems to explain the concept of PageRank in simpler language, making it easier for the beginning SEO marketer to understand. The patent explains how a link on a page might be annotated.
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