A Manhattan federal judge ruled Thursday (February 25) that Ozzy Osbourne can proceed with his lawsuit against guitarist Tony Iommi over use of the Black Sabbath name.
Ozzy filed a lawsuit against Iommi in May 2009, claiming that Iommi illegally took sole ownership of the band's name in a filing with the U.S. Patent and Trademark Office.

Osbourne is suing Iommi for a 50 percent interest in the "Black Sabbath" trademark, along with a portion of Iommi's profits from use of the name.

The Manhattan federal court suit also charges that Osbourne's "signature lead vocals" are largely responsible for the band's "extraordinary success," noting that its popularity plummeted during his absence from 1980 through 1996.