Yes, 1992 & 1993 seasons.
The Dallas Cowboys did not play two consecutive losing Super Bowls. However, they were beaten in their two appearances against the Pittsburgh Steelers in Super Bowls X and XIII. Between those two, Dallas beat the Denver Broncos in Super Bowl XII. (Dallas finally beat the Steelers in Super Bowl XXX, but are one victory behind Pittsburgh.)(see the related concise list question)
Two: Super Bowls VI and XII.
Two teams have won three Super Bowls in four years: 1) Dallas Cowboys - Super Bowls XXVII, XXVIII, and XXX 2) New England Patriots - Super Bowls XXXVI, XXXVIII, and XXXIX
Through the 2009 season, Norv has been a part of two Super Bowl winners. He was the offensive coordinator for the Dallas Cowboys that won Super Bowls XXVII and XXVIII.
SF 49ers and Dallas Cowboys
There have only been 7 teams that have won consecutive Super Bowls :Green Bay Packers (Super Bowls I and II)Miami Dolphins (Super Bowls VII and VIII)Pittburgh Steelers (twice : Super Bowls IX and X, XIII and XIV)San Francisco 49ers (Super Bowls XXIII and XXIV)Dallas Cowboys (Super Bowls XXVII and XXVIII)Denver Broncos (Super Bowls XXXII and XXXIII)New England Patriots (Super Bowls XXXVIII and XXXIX)
The Pittsburgh Steelers have won six Super Bowls. Charles Haley won two Super Bowl rings with the San Francisco 49ers and three with the Dallas Cowboys.
The Dallas Cowboys and the Pittsburgh Steelers share the record for most appearances with eight.
The Steelers lost two Super Bowls. The first was to the Dallas Cowboys in Super Bowl XXX, by the score of 27-17. The second was to the Green Bay Packers in Super Bowl XLV, by the score of 31-25.
Head coach Tom Landry guided the Dallas Cowboys to five Super Bowl appearances and two wins. The Cowboys defeated the Miami Dolphins 24-3 in Super Bowl VI in Miami and beat the Denver Broncos 27-10 in Super Bowl XII in New Orleans.
Two. He was the starting quarterback in the Denver Broncos' back-to-back championships in Super Bowls XXXII and XXXIII.
Chuck Noll - Four Super Bowls (IX, X, XIII, XIV) Bill Walsh - Three Super Bowls (XVI, XIX, XXIII) Joe Gibbs - Three Super Bowls (XVII, XXII, XXVI) Bill Belichick - Three Super Bowls (XXXVI, XXXVIII, XXXIX) Vince Lombardi - Two Super Bowls (I, II) Don Shula - Two Super Bowls (VII, VIII) Tom Landry - Two Super Bowls (VI, XII) Tom Flores - Two Super Bowls (XV, XVIII) Bill Parcells - Two Super Bowls (XXI, XXV) Jimmy Johnson - Two Super Bowls (XXVII, XXVIII) George Seifert - Two Super Bowls (XXIV,XXIX) Mike Shanahan - Two Super Bowls (XXXII, XXXIII) See this chart for a complete breakdown of head coaches with multiple Super Bowl appearances: http://en.wikipedia.org/wiki/List_of_Super_Bowl_head_coaches#Coaches_with_multiple_Super_Bowl_appearances