Dann, Dorfman, Herrell and Skillman is a law firm that specializes in intellectual property litigation. Its practice areas include copyrights, trademarks, patent infringement, antitrust litigation, unfair trade practices, cyber law and unfair competition. Additionally, Dann, Dorfman, Herrell and Skillman provides legal services in the areas of licensing, trade secrets, domain name rights, computer technology, franchising, invention development agreements and related litigation. It has filed and prosecuted domestic and international patents in the areas of mechanics, optics, electronics, computers, chemistry and biotechnology. Dann, Dorfman, Herrell and Skillman maintains a presence in Philadelphia.