This is what most of my research has been. Here's a post from Markenomics that I created some time ago with a lot of links on the algorithms used. http://www.

This is what most of my research has been. Here's a post from Markenomics that I created some time ago with a lot of links on the algorithms used. http://www.markenomics.com/item?id=321 http://www.markenomics.com/item?id=321 Also, the US Patent website has lots of interesting stuff if you are really wanting to dig deep into this stuff.