A summary of Southern California-related business litigation developments during the past week.

Dispute Over Coasters Name: A Coasters band member has sued the manager of another Coasters band to prevent him from interfering with a New Year’s Eve performance at the Nugget in Las Vegas. The Coasters, formed in 1954, split in 1957 into two bands. Billy Richards, who joined one band, filed a Los Angeles federal court suit alleging that Walter Kohn, manager of the other band, was threatening to sue the Nugget on grounds that Kohn’s band held an exclusive trademark to the band’s name. A judge issued a temporary restraining order barring Kohn from interfering with the Richards band’s engagement at the Nugget. The suit also seeks a permanent injunction against interference. (Case No. 90-6943. Filed Dec. 27, 1990.)