The founder and managing partner of Gershman Law, PLLC, Dyan Gershman is a highly experienced New York City corporate lawyer who concentrates her legal practice on mergers and acquisitions and corporate and business matters. Dyan Gershman also provides legal advice in the area of intellectual property licensing. A patent is an intellectual property (IP) right that gives its holder the exclusive right to use, sell, or share the property with another entity. Unless a mutual agreement exists between a third party and a patent holder, the third party cannot use the patented invention. There are three types of patents: design, utility, and plant.