At least one drawing is required if it is necessary for understanding the subject matter to be patented. Prior to writing claim answer these questions: • What is the invention?• What are the pieces and parts that make up the invention? The first step in the patent registration process includes drafting and filing of a provisional patent. Getting a patent in Pennsylvania is the same as any other state. The patent application is filed with the United States Patent and Trademark Office (USPTO). Patent drafting is the stage where your invention disclosure and patentability search report would prove very helpful in writing a good patent application. This book provides a very clear guide for those who are willing to read, re-read and attentively study it's contents, in order that one may make the most educated choices (and sometimes guesses) during the writing of one's own patent. Patent drawing examples are charts or illustrations of an invention used in a patent application. They help illustrate your invention for better understanding.