Roy’s practice focuses on all aspects of intellectual property law, with an emphasis on patent litigation and post-grant challenges before the Patent Trial and Appeal Board (PTAB).
Roy has litigated cases in the fields of life sciences, medical devices, chemicals, consumer products, and software/internet technology. He has represented numerous industry-leading companies in IP disputes in jurisdictions across the country and has appeared extensively in the District of Delaware and the District of New Jersey. His expertise spans a wide range of technologies, with substantial experience in the pharmaceutical and semiconductor industries.
Roy joined Klarquist in 2019 and became partner in 2023.
J.D. with Honors, Chicago-Kent College of Law (Illinois Institute of Technology), 2008
B.S., Chemical Engineering, University of Illinois at Urbana-Champaign, 1999
U.S. Department of Veterans Affairs, 2018 (Accred. No. 43,823)
U.S. Patent and Trademark Office, 2008 (Reg. No. 61,735)
U.S. Court of Appeals for the Federal Circuit, 2012
U.S. District Court for the Northern District of Illinois, 2009
U.S. District Court for the Western District of Wisconsin, 2009
DLA Piper US LLP | Associate, 2008 – 2009, Summer Associate, 2008 | Chicago, IL
United States District Court for the Northern District of Illinois | Judicial Extern for Chief Judge Rebecca J. Pallmeyer, 2007 | Chicago, IL
Air Liquide, Inc. | Research Engineer, Electronics Division, 2000 – 2006 | Countryside, IL
Tomoegawa (USA) Inc. | Research Engineer, 1999-2000 | Wheeling, IL
Member, Oregon Patent Law Association
Member, Federal Circuit Bar Association
Member, National Asian Pacific American Bar Association
Member, Thai American Bar Association
Honors & Awards
Leading Lawyers Network “Emerging Lawyer” for Intellectual Property Law | 2016, 2017, 2018, 2019
Computer-Assisted Legal Instruction (CALI) Excellence for the Future Award for Highest Scoring Student – Patent Office Practice | 2006
Roy Chamcharas, Who’s the Boss? Seventh Circuit Limits Executive Branch, 2 Seventh Circuit Rev. 146 (2006).
Tiwari, M.; Megaridis, C.; Majumder, P.; Takoudis, C.; Belot, J.; Xu, M.; McAndrew, J.; Chamcharas, R. “Metal Line Interconnects Produced by Means of Printable Copper Precursor Solutions.” ASME 2006 International Mechanical Engineering Congress and Exposition, Chicago, Illinois, 2006.
Brief of Amicus Curiae, Generic Pharmaceutical Association in support of Appellees, In re: Lipitor Antitrust Litigation, August 21, 2017