Ohio State’s Block ‘O’ logo is one of the most recognizable logos in American sports. And because of that, Ohio State is protective of that trademark. So when it was discovered that Overtime ...

Ohio State first registered a trademark for a version of its block “O” logo in 1997, then another version in 2003 and a third in 2013, the trademark documents state.

Ohio State released a new athletic logo to the public Monday, the same day it approved the use of the non-rounded in Block “O” in its academic logo.