Practice Areas



  • District of Columbia Bar, 2009
  • New York State Bar, 2008
  • U.S. Patent and Trademark Office, 2003


University of New Hampshire School of Law (formerly known as Franklin Pierce Law Center), Concord, NH, Master of Intellectual Property and JD, 2002

Southern Connecticut State University, New Haven, CT B.S. Chemistry and Biology, 1998

Teaching Positions

  • University of New Hampshire School of Law (formerly known as Franklin Pierce Law Center, (Concord, NH) 2002 IP Moot Court Teaching Assistant


  • Russian
Photo of Leo V. Gureff

Leo V. Gureff

Washington, D.C.

Leo has deep expertise in drafting and prosecuting utility and design patent applications on behalf of foreign and domestic clients in the areas of mechanical and biomedical arts, polymer chemistry, chemical processing and synthesis, and materials science. He is an experienced lecturer and presenter on the U.S. patent practice and intellectual property law in foreign jurisdictions. He is fluent in Russian and has extensive and ongoing experience traveling to Russia and Ukraine to meet with and cultivate clients.  During these travels, he has given presentations to the Ukrainian Intellectual Property Institute, the Ukraine Minister of Justice, and extensively in Akademgorodok, Novosibirsk, Russia.

Leo represents technology companies in connection with structuring and negotiating a wide array of complex commercial transactions and agreements, including vendor customer agreements, VAR/OEM/distributor agreements, master services agreements, software as a service agreements, subcontract agreements, alliance partner agreements, offshore IT and development outsourcing agreements, and data access.  Leo also represents companies in the domain name dispute resolution proceedings (UDRPs) on both complainant and respondent sides.

Experience Highlights

Counsel, Cantor Colburn LLP, 2018 - present

Of Counsel, Muncy, Geissler, Olds & Lowe, P.C., Fairfax, VA, 2015-2018

Senior Counsel, International Legal Counsels PC, Alexandria, VA 2005-2015

Patent Agent, Sidley Austin, LLP, Washington, D.C. 2004-2005

Patent Agent/Consultant, Update Legal, Hartford, CT 2003-2004

Associate, Law Offices of Paul L. Shafer, New Haven, CT 2002-2003

Summer Associate, Ohlandt, Greeley, Ruggiero & Perle, Stamford, CT 2001



SibLegalWeek 2018

Professional Affiliations

Intellectual Property Owners Association (IPO)