What is special about the Court of Appeals for the Federal Circuit?

With a national jurisdiction, the Court of Appeals for the Federal Circuit hears appeals on patent and certain civil cases from courts such as the U.S. Court of International Trade and the Court of Federal Claims, among others.

under god i have placed my chiest strentgh and the safe guard to my loyal subjects

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;