This book is suitable for a law school class on patent prosecution, which is advocacy in the United States Patent and Trademark Office. Books on patent law are not helpful to a lawyer developing an argument for patentability, because they often apply patent office standards that are different from those in court. This book includes edited cases and problems with answers to illustrate the topics, and a single case study consistent throughout the book includes an invention story, developing a theory of patentability, preparing a patent application, surprises in the patent office, and a response to a patent examiner's rejection.