Complex sentence: U.S. District Judge Katherine Forrest ruled on December 28,2011, that Marvel Entertainment owned the character, saying Friedrich gave up any ownership claim when he signed checks containing language relinquishing all rights, adding that Friedrich had also signed a 1978 agreement with Marvel relinquishing rights.
Split into simpler sentences: U.S. District Judge Katherine Forrest ruled on December 28,2011, that Marvel Entertainment owned the character, saying Friedrich gave up any ownership claim when he signed checks containing language relinquishing all rights. She said Friedrich had also signed a 1978 agreement with Marvel relinquishing rights.