Late-night TV show host Conan O’Brien claims he did not steal jokes from a Winnetka native comedy writer.

Alex Kaseberg filed a lawsuit against O’Brien in July for copyright infringement over jokes he posted on social media. Paperwork filed this week in California showed O’Brien said Kaseberg’s jokes are "not sufficiently original to entitle (them) to copyright protection," according to the Chicago Tribune.

O’Brien, TBS, the Executive Producer and Head Writer for “Conan” are being sued by Kaseberg. He has accused the team of stealing four jokes from his blog and Twitter account. He filed the lawsuit on July 22.

Conaco, LLC, the production company behind “Conan” released a statement to NBC San Diego when the lawsuit was initially filed. “We at Conaco firmly believe there is no merit to this lawsuit," said Drew Shane, a Conaco spokesperson.

The first joke allegedly stolen was posted on to the Winnetka-raised writer’s online blog in January.

“A Delta flight this week took off from Cleveland to New York with just two passengers. And they fought over control of the armrest the entire flight,” the joke read, according to the lawsuit.

That same evening, the joke appeared in Conan's monologue, according to Kaseberg’s suit.



A second joke posted to Kaseberg’s blog and Twitter account on Feb. 3 about Tom Brady later appeared on the show the following day, the suit claims.

"Tom Brady said he wants to give his MVP truck to the man who won the game for the Patriots. So enjoy that truck, Pete Carroll," the second joke reads, according to the lawsuit.

He posted the third on his personal blog and Twitter account on Feb. 17.

"The Washington Monument is ten inches shorter than previously thought. You know the winter has been cold when a monument suffers from shrinkage," the third joke reads, according to the lawsuit.

That same night it appeared in the comedian's monologue.

A fourth joke posted on June 9 made fun of streets named after Bruce Jenner, who had just revealed he was changing his name to Caitlyn Jenner amid his gender transition; the joke also appeared in the monologue that same day, the lawsuit alleges.

Kaseberg is seeking more than $600,000 in damages.