The U.S. Constitution gave the power to the Federal Court System. The Federal courts are involved in cases regarding the federal law - for example, patents, federal taxes and other federal crimes.
A court established by the federal government and having jurisdiction over questions of federal law.
n. the court system which handles civil and criminal cases based on jurisdictions enumerated in the Constitution and federal statutes. They include federal district courts which are trial courts, district courts of appeals and the U.S. Supreme Court, as well as specialized courts such as bankruptcy, tax, claims (against the government) and veterans' appeals.
The Free (Legal) Dictionary
The Constitution created the Supreme Court and empowered Congress, in Article I, Section 8, to establish inferior federal courts. The authority of federal courts is limited to that given to them by the federal statutes that created them. Federal courts exist independently of the system of courts in each state that adjudicate controversies that arise pursuant to the laws of that state.
The United States federal courts comprises the Judiciary Branch of government organized under the Constitution and laws of the federal government of the United States.