SEO professionals were very excited when Google’s Search Engine 125 Patent was approved.
There are 63 claimed points in this patent application. Each one has its importance, and some has brought big discussions on SEO forums.
Some claims also have clarified some specific confusions. As an example we can use the "Link Aging" . Here’s the related claim:
54. A method for ranking a linked document, comprising: determining an age of linkage data associated with the linked document; and ranking the linked document based on a decaying function of the age of the linkage data.
Claim 54 clarifies and supports that, "link aging" occurs in Google Search Algorithm. So, to explain it basically; a backlink to your site which has been placed 2 years ago is more valuable than a backlink which is placed last week.
This is another action Google has taken against spammers who can create tremendous number of artificial backlinks for short term success in the SERP’s.
You can find a list of "Approved Patents" related to search engine technologies here .