PALO ALTO ­— Wilmer Cutler Pickering Hale and Dorr has nabbed an intellectual property litigation partner from Hogan Lovells, but lost a counsel in that group to Dentons.

Song Zhu, Ph.D., comes to Wilmer’s Palo Alto office after three years with Hogan Lovells, and Wilmer touted the Asia expertise he will bring to the firm. Russell Tonkovich, M.D., joined Dentons’ IP and technology practice as a partner in the San Francisco and Silicon Valley offices. He had been counsel at Wilmer for four years.