The United States Patent and Trademark Office, Office of Enrollment and Discipline  web site contains information on requirements for admission to the patent bar, notice of examinations, exam questions and answers, and exam results.
See also Library Resources - Bar Exam - Patent Bar .
Commercial courses for the Patent Bar:
INTELLECTUAL PROPERTIES ENTERPRISES 
Provides an array of prep review materials aimed at helping you pass the patent bar exam. IP Enterprises provides you with a lecture style outline of the MPEP, 37 C.F.R. and 35 U.S.C. The outline includes summaries, key points, and an index.
LONGACRE'S PATENT BAR SERIES 
A patent bar home study course by Walters Kluwer publishers.
PRACTISING LAW INSTITUTE PATENT BAR REVIEW 
Offers live, home study and/or Webcast patent bar reviews courses.
links checked LER 6/13