The first of its type was crippled by the Supreme Court's ruling in U.S. v E.C. Knight Co. although it was eventually used successfully against Standard Oil.  
Noted examples of this type of legislation are the 1976 Hart-Scott-Rodino Act as well as the 1950 Celler-Kefauver Act and the 1936 Robinson-Patman Act.  Opposing a type of arrangement devised by Samuel Dodd, they are based upon Congress's right to regulate interstate commerce.  The first of its type was crippled by the Supreme Court's ruling in U.S. v E.C. Knight Co. although it was eventually used successfully against Standard Oil.  FTP, identify this type of law, the most famous of which are the 1914 Clayton Act and 1890 Sherman Act and which deter corporate monopolies.
Noted examples of this type of legislation are the 1976 Hart-Scott-Rodino Act as well as the 1950 Celler-Kefauver Act and the 1936 Robinson-Patman Act.  
Anti-trust act or legislation or regulation etc.