Does Conan O’Brien Steal His Late Night Jokes From Twitter?

A lawsuit has been filed against Conan O’Brien alleging that the late night host plagiarized several of his jokes.

Robert Kaseberg filed a complaint in a California federal court last week because he believes O’Brien violated copyright laws by lifting several of his jokes without permission, according to The Hollywood Reporter.

Kaseberg said he made the jokes on Twitter, and that they later ended up on Conan.

“A Delta flight this week took off from Cleveland to New York with just two passengers,” Kaseberg said he wrote on Twitter in mid-January. “And they fought over control of the armrest the entire flight.”

Kaseberg said the joke was used during O’Brien’s opening monologue the same night.

Then Kaseberg said he tweeted out, “The Washington Monument is ten inches shorter than previously thought. You know the winter has been cold when a monument suffers from shrinkage.”

O’Brien used that joke, too.

Conaco, the production company behind Conan, said they “firmly believe” the lawsuit has no merit. (VIDEO: Mila Kunis: ‘Boy Did These Things Grow!)