US firms separate

* Two US firms which merged four years ago have split up. Lewis D'Amato Brisbois & Bisgaard merged with Buxbaum & Choy to form Lewis D'Amato Brisbois Bisgaard & Choy. The firm's Asian offices will now be run by Arnberger, Kim, Buxbaum & Choy while Lewis D'Amato Brisbois & Bisgaard will continue to operate its five offices in California.