The toasters were the subject of two lawsuits, the first in 1993, "Berkeley Systems vs Delrina Corporation", over a module of Delrina's "Opus 'N Bill" screensaver in which Opus the penguin shoots down the toasters. After a U.S. District judge ruled that Delrina's "Death Toasters" was infringing, Delrina later changed the wings of the toasters to propellers. The second case was brought in 1994 by 1960s rock group Jefferson Airplane who claimed that the toasters were a copy of the winged toasters featured on the cover of their 1973 album "Thirty Seconds Over Winterland". The case was dismissed because the cover art had not been registered as a trademark by the group prior to Berkeley Systems' release of the screensaver.