During the Marshall Court era (1801–1835), interpretation of the Commerce Clause gave Congress jurisdiction over numerous aspects of intrastate and interstate commerce as well as activity that had traditionally been regarded not to be commerce. Starting in 1937, following the end of the "Lochner" era, the use of the Commerce Clause by Congress to authorize federal control of economic matters became effectively unlimited. Since "United States v. Lopez" (1995), congressional use of the Commerce Clause has become slightly restricted again to be limited to matters of trade or any other form of restricted area (whether interstate or not) and production (whether commercial or not).