Want to know about the latest applications for patents dealing with online navigation? How about fuel cells, optical systems or shoes? Head on over to FreshPatents.com, where new patents applications are listed by category. And you don’t have to check the site regularly, since each subcategory includes a link to the RSS feed. The Invent Blog notes that access to such knowledge carries a commensurate risk: “If your company regularly uses a service like this (or does regular patent searches for what your competitors are patenting) it is pretty hard to argue that you didn’t have notice that your competitor had a patent.”