A written document seeking patent protection and filed with the U. S. Patent and Trademark Office or a patent office outside of the United States. In the United States, the application must include a disclosure of the invention that would, without undue experimentation, enable a person of ordinary skill in the art to make and use the invention; at least one claim; drawings (if drawings are necessary to understand the invention); and disclosure of what the inventor views as the best mode for practicing the invention. The claims of the application define the invention and the scope of the coverage sought. The written description and enabling disclosure are typically found in the specification portion of the application. The specification is the narrative portion of the application, along with the drawings, if present. The specification includes the description of the preferred embodiments or best mode of practicing the invention. It may include a summary of the invention; a description of the background of the invention, including prior art or the problem dealt with by the invention; and a description of the drawings. The specification may also include an abstract of the disclosure.