What NFL football team has never changed it's logo?

Jacksonville Jaguars

Carolina Panthers

Houston Texans

Pittsburgh Steelers

New England Patriots

Seattle Seahawks

Denver Broncos

New York Jets (used to be called the Titans)

New York Giants

San Francisco 49ers

Green Bay Packers

Buffalo Bills

Miami Dolphins

Tampa Bay Buccaneers

Atlanta Falcons

New Orleans Saints

Cincinnati Bengals

Philadelphia Eagles

Minnesota Vikings

Detroit Lions the Lions used to be the Portsmouth (OH) Spartans