Kori didn't trademark any of his stuff. Calling it his trademark is the same as calling it is calling card. It doesn't mean she gave him a calling card, and it doesn't mean she gave him a trademark. She just said it's his shtick, that's all.
Besides, Timvp left it up to the anointed ones to police.
Dale has sewn the seeds of discord and must now reap the whirlwind.