Prior to writing claim answer these questions: • What is the invention? • What are the pieces and parts that make up the invention?The text must be a nonscript font (e.g. , Arial, Times Roman, or Courier), preferably with a font size of 12. In the tools section of this tutorial, you will find a sample USPTO Application. Data Sheet that must accompany a patent application. First, every patent claim needs a preamble, which is the introductory phrase in a claim. Second, every patent claim needs a transition. By drafting the claims first, you can decide on the terminology to use and make sure that terminology is consistent throughout the. The specification is a written description of the invention and of the manner and process of making and using the same.