Who is never lost a Super Bowl?

The Colts won two super bowls in 1971 and 07 although in the 1971 victory they were located in Baltimore. The New York Jets never lost a super bowl in 1969 they won Super Bowl III. The Steelers also have never lost a Super Bowl the had victories in 75 76 79 80 and 06. The 49ers also never lost a Super Bowl game 82 85 90 95. The Giants won 87 91 and 07. The Ravens and Buccaneers both won the only supr Bowl they were in 01 and 03 respectively