The most memorable letter-as-logo is Barack Obama's "O," but before him, Hubert H. Humphrey (D) used a triple "H" in 1968, and one iteration of George W. Bush's (R) 2004 logo used just the "W." ...

Ohio State asked the company in July to stop using of the logo, saying it was too close to its own trademarked octagonal “block O” letter. “While Ohio State recognizes there are many ...