A is defined as an object that has an intrinsic utilitarian function beyond simply conveying information or displaying its own appearance. Common examples include clothing, furniture, machinery, and lighting fixtures. Key Legal Principles

: It prevents individuals from using copyright—which has a much longer duration—to gain a monopoly over functional items that should instead be protected by utility patents .

For more detailed information, you can refer to the official U.S. Copyright Office guide on Useful Articles or the Legal Information Institute's definition .