Endologix Announces Favorable Markman Ruling in Cook Patent Litigation

Endologix, Inc. (Nasdaq: ELGX), developer and marketer of minimally invasive treatments for aortic disorders, announced today that Judge Tanya Walton Pratt of the United States District Court for the Southern District of Indiana in Indianapolis has issued a Markman ruling in the ongoing patent infringement lawsuit filed against the Company by Cook Medical.

In a Markman ruling, the court determines the meaning of disputed patent claim terms at issue in patent litigation. After a briefing and oral argument on April 15, 2011 as to the meaning of a number of terms of the claims of the two patents that Cook is asserting in the lawsuit, Judge Pratt adopted many of Endologix's proposed constructions for several terms of claims of both asserted patents, including constructions that the Company considers to be important for the outcome of the case.

The trial date for the patent infringement lawsuit has not yet been set but is expected to be set for fall 2012.