Source: U.S. Patent and Trademark Office
Utility patents are patents for invention. Patent origin is determined by the residence of the first-named inventor.
See Explanation of Data and Types of Patent Applications and Proceedings for more information.
U.S. Patent and Trademark Office, U.S. Granted Utility Patents Originating in Douglas County, SD [PATENTCOUNTY46043], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PATENTCOUNTY46043, September 29, 2023.