misterjinx - 12:25 am on Dec 10, 2008 (gmt 0)
Not only... in historical data patents, Google can check
* the domain;
* informations about the the owner of the domain;
* how many time is the domain registered to the same person;
* how many years is the domain registered according to this logic: if I register a domain for 10 years it means I want to create a project and I believe in it. Differently domains yearly renewed could be an indicator of a lesser robust project (or spam). Nowadays I think this is a secondary factor but I never personally tested.