"It has been reported that Rudolph Giuliani has trademarked the name 'Rudolph Giuliani' so other candidates can't use his name in negative campaign ads. ... For similar reasons, Hillary Clinton has trademarked the words 'ballbuster,' 'castrater,' and 'nutcruncher.'"
Source : William Cowper (1856). “The task, Table talk, and other poems: With critical observations of various authors on his genius and character, and notes, critical and illustrative”, p.334