In answering this question, I reviewed the Bill Belichick years (2000-present), as conventional wisdom says "Bill Belichick never loses to the same team twice in a season".
However conventional wisdom is incorrect. The Patriots have lost to the same opponent twice in a season multiple times since Belichick became the head coach in 2000.
2012 - lost twice to the Baltimore Ravens, 1 regular season game, 1 playoff game
2011 - lost twice to the New York Giants, 1 regular season game & the Super Bowl
2010 - lost twice to the New York Jets, 1 regular season game, 1 playoff game
2006 - lost twice to the Indianapolis Colts, 1 regular season game, 1 playoff game
2005 - lost twice to the Denver Broncos, 1 regular season game, 1 playoff game
2000 - lost both regular season games to the New York Jets and Miami Dolphins
As indicated, this list includes only the Belichick years. If a further analysis is needed it can be provided.
Through week 11, the Patriots are 8-2.
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New England Patriots
In the 2015 regular season, the New England Patriots lost to the following teams: Denver Broncos (ot) Philadelphia Eagles New York Jets (ot) Miami Dolphins In the Playoffs, the Patriots lost to the Denver Broncos in the AFC Championship game.
The New England Patriots
In the 2006 season, the New England Patriots went 12-4. The Patriots went 2-1 in post season play. In the 2007 season, the New England Patriots went 16-0. The Pats went 2-1 in post season play.
The Patriots have had playoff appearances in the following years:2001 - won Super Bowl XXXVI2003 - won Super Bowl XXXVIII2004 - won Super Bowl XXXIX2005 - lost Division Championship Game2006 - lost AFC Championship Game2007 - lost Super Bowl XLII
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The New England Patriots lost to the New York Jets on Sept 19th with a score of 28 to 14. Then the Patriots lost to Cleveland 34 to 14 on November 7th. Those are the only 2 games they lost during regular season in 2010-2011.
Two teams. They lost to the Raiders in Superbowl XV and to the Patriots in Superbowl XXXIX.
They lost to the New England Patriots, 29-32, in Super Bowl XXXVIII on February 1st, 2004.
If you mean Superbowl XXXI, then they beat New England Patriots, but if you mean Superbowl XXXII, they lost to Denver Broncos.