On 10 April 1970, in the midst of business disagreements with his bandmates, McCartney announced his departure from the group. He filed suit for the band's formal dissolution on 31 December 1970. More legal disputes followed as McCartney's attorneys, his in-laws John and Lee Eastman, fought Lennon, Harrison, and Starr's business manager, Allen Klein, over royalties and creative control. An English court legally dissolved the Beatles on 9 January 1975, though sporadic lawsuits against their record company EMI, Klein, and each other persisted until 1989. After the Beatles' break-up in 1970, McCartney continued his musical career with his first solo release, McCartney, a US number-one album. Apart from some vocal contributions from Linda, McCartney is a one-man album, with Paul providing compositions, instrumentation and vocals.