What are the four statutory categories of invention recognized by the USPTO?

The four statutory categories of invention recognized by the USPTO are process, machine, manufacture, and composition of matter. This classification is established in Title 35 of the United States Code, which defines what types of inventions can be patented.

• A "process" involves a series of steps or acts performed to achieve a certain result and can include methods of doing business or other techniques.

• A "machine" refers to devices or apparatus that perform a specific function, which can range from simple tools to complex equipment.

• "Manufacture" encompasses articles made or produced from raw materials, typically referring to tangible goods.

• "Composition of matter" covers chemical compositions, materials, and mixtures, including pharmaceuticals and other substances.

This categorization is foundational to how patents are evaluated and issued by the USPTO, ensuring clarity and consistency in what constitutes a patentable invention. Other options mentioned do not align with the established statutory categories and thus fail to represent the categories recognized by law.