High Quality Content by WIKIPEDIA articles! Michael Greenberg is an American lawyer, regarded as a legal expert in intellectual property law and patent law. He is a partner of the Washington, D.C.-based law firm, Greenberg & Lieberman, with Stevan Lieberman, established in 1996. As part of the firm, Greenberg has been involved in hundreds of UDRP or trademark infringement disputes and is a well-regarded and experienced litigator, with particular expertise in patent infringement cases.