In 2003, Greenberg was involved in several UDRP or trademark infringement disputes such as Size, Inc. v. Future Media Architects, Jensen Research v. Future Media Architects, Internet Development Corp v. TitleSoft, Internet Development Corp v. Senetek, Quantum Software Systems Ltd v. Future Media Architects, and a copyright infringement case, Future Media Architects v. Corey Richardson. In 2004, the firm continued to represent Future Media Architects and Internet Development Corporation in a series of disputes over UDRP and trademark infringements and other matters including representing Future Media Architects against Cool, Inc., QNX, Capital Networks PTY Ltd, Punto Verde, Murat Yikilmaz and Hay Napa International, and representing Internet Development Corporation against B.S.A. Corporation at Maryland District Court,Freightliner and Lactel.