A more thorough explanation:

PCT APPLICATION A PCT application is a type of international patent application filed under the Patent Cooperation Treaty. It allows an inventor to seek patent protection in multiple countries simultaneously. The application includes a specification, drawings, and a filing fee. - John wants to protect his invention in multiple countries, so he files a PCT application. - Sarah's PCT application designates the United States as one of the countries where she wants patent protection. The examples illustrate how an inventor can use a PCT application to seek patent protection in multiple countries. The application is filed under the Patent Cooperation Treaty and includes a specification, drawings, and a filing fee. By filing a PCT application, the inventor can conduct simultaneous patent searches and examinations in multiple countries.