Si visitamos la web de patente de USA nos encontraremos con la última patente de Google llamada Techniques for finding related hyperlinked documents using link-based analysis.
El resumen (en inglés) comenta lo siguiente:
Techniques for finding related hyperlinked documents using link-based analysis are provided. Backlink and forwardlink sets can be utilized to find web pages that are related to a selected web page. The scores for links from web pages that are from the same host and links from web pages with numerous links can be reduced to achieve a better list of related web pages. The list of related web pages can be utilized as a feature to a word-based search engine or an addition to a web browser.
y que amplia y potencia su sistema de PageRank además del sistema de crawleado a través de enlaces.
Por Googlemania