Carter Bryant, the creator of the Bratz dolls, admitted on the witness stand that he came up with the Bratz doll line while working for Mattel.

Bryant said he took the drawings to an agency that shops around concepts by artists like him, but he didn't think he was doing anything wrong. MGA Entertainment, the defendant, ultimately ended up buying the concept and produced the dolls.

Mattel is suing MGA for copyright infringement because, by contract, anything produced by Bryant while under employment is owned by Mattel.

This is a huge blow to MGA as their defense rest on their argument that Bryant wasn't working for Mattel when he came up with the Bratz concept.

It may look like two companies fighting over who gets the toy, but at stake is hundreds of millions of dollars in licensing fees.