The United States Patent Classification (USPC) is a system used to categorize patents based on their technological features and functions. Established by the United States Patent and Trademark Office (USPTO), the USPC organizes patents into various classes and subclasses, making it easier for inventors, researchers, and legal professionals to search for and analyze patent documents. Each class in the USPC represents a specific area of technology, such as mechanical engineering or biotechnology. This classification system helps streamline the patent examination process and ensures that similar inventions are grouped together, facilitating better access to relevant information and promoting innovation.