Diomed patent defendant files for Chapter 11

Diomed Holdings Inc. reports that Total Vein Solutions LLC, which Diomed sued for patent infringement in 2004, has filed for Chapter 11 bankruptcy protection.
Andover-based Diomed brought suit in 2004 in the U.S. Federal District Court for the District of Massachusetts against Total Vein Solutions of Houston seeking injunctive relief and damages for infringement of Diomed's patent for its EndoVenous Laser Treatment (EVLT) for varicose veins.
According to Diomed, on Jan. 17, 2008, prior to a hearing at which the court was expected to rule on Diomed's motion for an injunction against TVS' sales of products that Diomed believes infringes its patent, TVS filed for protection under Chapter 11.