Source: U.S. Patent and Trademark Office
Patent origin is determined by the residence of the first-named inventor.
Utility patents are patents for invention.
See PTMT Products and Services Brochure and Types of patent applications and proceedings for more information.
U.S. Patent and Trademark Office, U.S. Granted Patents: Utility Patents Originating in Angola [PATENT4NAOUTILITY], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PATENT4NAOUTILITY, December 4, 2021.