Patterson Companies, Inc. (Patterson) is a value-added distributor serving three markets: North American dental supply; United States companion-pet (dogs, cats and other common household pets) and equine veterinary supply, and the worldwide rehabilitation and assistive products supply market. The Company's three segments, dental supply, veterinary supply and rehabilitation supply, are business units that offer similar products and services to different customer bases. Patterson's operating units include Patterson Dental, Webster Veterinary (Webster) and Patterson Medical. In December 2008, Patterson Dental acquired Dolphin Imaging Systems, LLC and Dolphin Practice Management, LLC, the providers of three-dimensional (3D) imaging and practice management software for specialized dental practitioners, including orthodontists, oral maxillofacial surgeons and dental radiologists. In April 2009, Homecraft acquired Mobilis Healthcare.