Patent infringement suits against several prominent e-discovery companies, filed by nonpracticing entity Lone Star Document Management LLC, are beginning to wind their way through legal proceedings.

Lone Star, dubbed a “patent troll” by critics, filed against Business Intelligence Associates Inc., CaseCentral, Catalyst Repository Systems Inc., Digital Reef Inc., Gallivan, Gallivan & O’Melia LLC, Trial Solutions of Texas LLC (Cloud Nine Discovery) and others, late in 2011. Lone Star also sued Cap Digisoft Solutions Inc. earlier this year.