Entrepreneur Steven Lamar is questioning the origin of Dr. Dre and Jimmy Iovine’s Beats headphones in the Los Angeles Superior Court, as he claims the duo allegedly screwed him out of $100 million in royalties.

Lamar says he was the one who brought the idea of a celebrity-endorsed headphone line to Dre and Iovine, back in 2006. They then fell out and the duo sued Lamar, with both parties eventually settling. However, the conditions were that Lamar had to relinquished his rights in exchange for four percent royalties of every headphone sold thereafter. With new models being sold, it’s in question whether or not Lamar is owed royalties for the models sold after the initial settlement was made.

As it stands, this entire matter is currently for the Los Angeles Superior Court to look at—with the end result not certain for either party.