Led Zeppelin lawyers ask judge to throw out Stairway to Heaven case

Led Zeppelin's lawyers have asked a judge to throw out a case accusing the band's songwriters of ripping off a riff for Stairway to Heaven.

The estate of Randy Wolfe, founder of the band Spirit, failed to prove it owned the copyright to his 1968 song Taurus or that it was substantially similar to Stairway, attorney Peter Anderson said.