Officially known as the Examination for Registration to Practice in Patent Cases Before the United States Patent and Trademark Office,  the Patent Bar Exam is a 100 question, six-hour long behemoth with a 50% pass rate.  Having passed it, I am now “pending registration” by the USPTO.  Basically, there is an oath and some money that I own them, but in approximately 7 weeks I should receive my registration number, then I can officially represent clients before the USPTO in patent cases.  Since I have not passed a state bar exam yet (pending graduating with my JD around 2011), I will be classified as a Patent Agent.