SAN FRANCISCO — Rockstar Consortium has turned to McKool Smith to fend off a Northern District patent suit filed by Google.

Courtland Reichman, founding partner of McKool Smith’s Silicon Valley office, and Dallas partner David Sochia entered appearances on Thursday for Rockstar, a patent holding group owned by Apple, Microsoft, Blackberry, Ericsson and Sony. Represented by Quinn Emanuel Urquhart & Sullivan, Google sued in December for declaratory judgment that it does not infringe seven Rockstar patents for smartphone technology.