What year was the iPod logo designed?

Although there has been extensive research done there does not appear to be a definitive answer as to when the iPod logo was designed. The Apple logos were designed as Sir Isaac newton under an Apple tree which was almost immediately replaced with a rainbow striped Apple in 1976. In 1998 it changed to the black Apple. The iPod was introduced in 2001 so the logo was designed sometime after 2001.