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 Litchfield County, CT [PATENTCOUNTY09005], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PATENTCOUNTY09005, January 19, 2022.