In case you missed their earlier court proceedings about trademarking "the," here a link to the article.
They're in a dispute with a sports company over the letter "O" as we speak. And to be honest, this one makes less sense to me than the case with "The."
Okay, I'll admit, they're really, really close.

sports.yahoo.com
They're in a dispute with a sports company over the letter "O" as we speak. And to be honest, this one makes less sense to me than the case with "The."
Okay, I'll admit, they're really, really close.

Ohio State sued after trying to stop sports network from using letter 'O' in logo
Ohio State tried to stop Overtime Sports Inc. from trademarking a logo featuring the letter "O." The company is now fighting back.