Thanks!
A part of the article (
http://www.huffingtonpost.com/2013/08/19/google-eye-movement_n_3781135.html) is shown below. The last statement caught my attention. It looks like one does not need to have a product. Is that true?
"already anticipating privacy concerns, the patent says the process may be opt-in or opt-out, and advertisers may be restricted to receiving "anonymous analytics." Still, it looks like the next step down the sci-fi road toward that scene in "Minority Report," in which Tom Cruise's character is bombarded by ads tailored directly to him.
As Phys.org notes, however, a patent is just a patent -- not even a prototype these days, not a product."