Christopher Lisiewski

Charles R. Macedo

Christopher Lisiewski is a Law Clerk at Amster, Rothstein & Ebenstein LLP and recent graduate of Fordham University School of Law. At Amster, Rothstein & Ebenstein LLP, he has worked in all areas of intellectual property law, including patents, trademarks, copyrights, and unfair competition. He has assisted clients in obtaining, maintaining, and enforcing their intellectual property portfolios.


Posts by Christopher Lisiewski


Is the Presumption of Validity Dead in Substitute Claims Issued as a Result of Motions to Amend After PTAB Proceedings?

Since the Federal Circuit’s decision in Aqua Products, Inc. v. Matal confirmed that the burden of persuasion on a the patentability of amended claims in a …

Can the Federal Circuit Refuse an Appeal by a Non-defendant Petitioner in an IPR?

JTEKT Corp. v. GKN Automotive Ltd., No. 2017-1828 (Fed. Cir. 2018) raises the important question of whether the Court of Appeals for the Federal Circuit can refuse to …