U.S. Federal Court triangle constructure

Supreme Court: (1)

1. Article third court 

2. in Washington D.C.,

3. Rule of four (Total 9 judges)

writ of mandamus

writ of certiorari  4/9

Court of Appeal: (13)

1. appellate court

2. 12 Regional Circuit +1 Federal Circuit

(circuit: traveling judges(judge in different places))

District Court: (94)

1. Each court has one bankruptcy court

plus one international trade court and one Federal claim court

2. Normally case related to Civil law and Criminal law.

3. Trial court