Article 1 Legislative Branch, Section Eight
The Congress shall have the Power To lay and collect Taxes, Duties, Imposts, and Excises, to pay the Debts and provide for the Common Defense and General Welfare of the United States; but all Duties, Imposts and Exicises shall be uniform throughout the United States.
To borrow Money on the credit of the United States.
To regulate Commerce with foreign Nations and among several States, and with the Indian Tribes
To establish an uniforrm Rule of Naturalization, and uniform Laws on the subject of Bankruptcies throughout the United States.
To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights.
To provide for the Punishment of counterfeiting the Securities and current Coin of all States.
To establish Post Offices and post Roads.
(The patent law)
To promote the progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries.
To constitute Tribunals inferior to the supreme Court.
To View the whole Constitution and/or the rest of Section 8, go to:
http://www.nara.gov/exhall/charters/constitution/constitution.html