Hogan Lovells has expanded its IP practice with five new partners in California.

EDWARD KWOK, JENNIFER LANTZ, STEVE LEVITAN, and CLARK STONE, who will work in the Silicon Valley office, made the move from Haynes and Boone. CHRISTIAN MAMMEN, who had a private practice, will be based in San Francisco. The new partners will handle litigation and arbitration, especially concerning patent and trademark law. Their areas of expertise include electrical engineering, digital video, and biotechnology.