The NFL has created or modified three new rules based on the New England Patriots 2014 Super Bowl run. The Patriots weren't the first team to take advantage of each of the rules (or lack thereof) in the 2015 season, but they were certainly blamed for the changes.
How about a fourth rule that won't be attributed to the Patriots because Bill Belichick proposed it himself?
According to Pro Football Talk, ESPN and the NFL "experimented" with cameras inside the pylons in the Bills-Browns preseason game.