Established in 1967, Hall Estill is a full-service business law firm that serves clients throughout the United States. The firm maintains offices in Arkansas, Oklahoma and Washington, D.C. Its practice areas include divorce and family law, as well as energy and natural resources. Hall Estill offers a range of intellectual property law services for issues concerning trademarks, copyrights and patents. The firm also provides assistance with various software, information technology and Internet-related issues. In addition, it has expertise in structuring and documenting commercial loan transactions. Hall Estill serves the finance, technology and real estate industries. The firm handles immigration cases.