A couple of our clients have had competitors setting up PPC campaigns with Google, using their patented brands. For some it has taken months to stop this, having to go through the beaurocracy of Google. For if Google looks simple from the outside it most definitely is not so within, take my word for it. If you are having this kind of a problem, contact Google by all means. But remember to have at hand all the legal documents you need to prove that you are indeed the owner of the brand, Google will be calling for it. Perhaps understandably, they can’t help you protect your brand unless you officially claim it.