Felix Frankfurter,
Union Brokerage Company v. Jensen…
“ We have before us only one narrow aspect of this Minnesota legislation, namely the power of Minnesota to deny to Union access to its courts because it has not obtained a certificate required of all foreign corporations doing business in the State. We have not before us the taxing power of Minnesota over such a business as that of Union, for we do not know the extent or nature of the power to tax that Minnesota would claim against Union. ”
