List of NFL franchise post-season droughts

Of the 13 teams that have never won the Super Bowl, four (4) are expansion franchises younger than the Super Bowl itself (Bengals, Panthers, Jaguars, and the Texans). The Falcons were enfranchised the season the Super Bowls began. The eight (8) other clubs (Cardinals, Lions, Eagles, Oilers/Titans, Chargers, Browns, Bills, and Vikings) all won an NFL or AFL championship prior to the AFL--NFL merger; in the case of the Vikings, however, the Super Bowl existed at the time they won their league title, leaving them and the Falcons as the only two teams to have existed for as long as or longer than the Super Bowl and to have never secured the highest championship available to them. The longest drought since a championship of any kind is that of the Cardinals, at 69 seasons.

Question: has every team in the nfl won a superbowl
Answer: no