Trademark Act
Trademark Act of 1946, as Amended (PUBLIC LAW 79-489, CHAPTER 540, APPROVED JULY 5, 1946; 60 STAT. 427) - currently contained in Chapter 22 of Title 15 of the United States Code (USC); the major body of U.S. law that governs federal registration of trademarks.
Source: U.S. Patent and Trademark Office.