Zachary Silbersher

Zachary Silbersher

Formal First Name

Zachary Silbersher is a patent attorney with lead-counsel experience in patent litigation, petitions for inter partes review, prosecution and licensing. Zachary is a Founding Partner of Kroub, Silbersher & Kolmykov, an intellectual property litigation firm, and Markman Advisors, a leading consultancy on patent issues for the investment community. Prior to co-founding KSK and Markman Advisors, he spent years as an Associate at Locke Lord and Torys. His areas of focus include strategic patent monetization, patent-portfolio valuation, consultation with buy-side and sell-side analysts on patent litigations within pharma and high-tech spaces. Zachary has been quoted regularly in the media on patent issues, including The Wall Street Journal, Reuters, Bloomberg, Vox/Recode, Nature Biotechnology and FiercePharma, among others.

Professional Experience

Academic History

  • Zachary has also been quoted regularly on BioWorld, Law360, Intellectual Asset Management (IAM), The Capital Forum, the Patent Investor, and Best Lawyers.

  • He frequently blogs on patent issues, particularly those related to pharma at

  • Zachary's Bar Admissions include New York - USPTO Reg.# 62,090.

Zachary Silbersher's Accomplishments

  • IAM Strategy 300 – The World’s Leading IP Strategists, 2015–2021

  • J.D. Law, Fordham University School of Law

  • B.S. Physics, Columbia University

  • B.A. Philosophy, Tufts University

Zachary Silbersher Admitted to Practice

  • C.A. Federal Circuit

  • E.D. New York

  • S.D. New York

  • W.D. New York

  • D. Colorado

  • U.S.P.T.O.