Prior to writing claim answer these questions: • What is the invention? • What are the pieces and parts that make up the invention?Explore our expert guide to patent filing in Chicago. Get practical tips and essential insights to protect your innovations effectively. Write out every aspect of the invention in words. Make drawings of the invention. Learn the essentials of patent drafting to protect your invention effectively. This is the format of what your application should follow for filing. Information for Inventors. Patent drawing examples are charts or illustrations of an invention used in a patent application.