United States Court of Appeals for the District of Columbia Circuit United States Court of Appeals for the Federal Circuit
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United States Circuit Court of the District of Columbia was
created in 1801.
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United States Circuit Court of the District of Columbia ended in
1863.
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There is no Court of Appeals named as the Twelfth Circuit; it is
called the US Court of Appeals for the District of Columbia. As the
name implies, the Circuit only covers appellate cases for the
District of Columbia.
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The United States District Court for the District of Massachusetts is the lower court under the United States Court of Appeals for the First Circuit.