The Arnold Information Technology group have created an ever-growing list of Google’s patent approvals and applications, sorted by date and featuring a short summary of each, giving users a little more insight into the plans of the search-engine behemoth. While most of the Google’s patents revolve around their lifeblood ad delivery market, there are a few patents which cover some of their search engine, gmail spam filtering technology and geo-location systems, which might interest some of the more diehard Google tech-watchers.

Read more: List of Google patents