April E. Weisbruch - McDermott Will & Emery


April E. Weisbruch focuses her practice on intellectual property matters, particularly in managing large-scale IP litigation and counseling. She works with clients in wide-ranging technology sectors, including pharmaceuticals, software applications, medical devices, organic chemistry and ballistics.

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  • Secured a finding of validity of two patents for Juxtapid® on behalf of Aegerion Pharmaceuticals Inc., in response to a challenge brought by the Coalition for Affordable Drugs (Kyle Bass) at the PTAB (Coalition for Affordable Drugs VIII LLC v. Trustees of the University of Pennsylvania, IPR2015-01835 and IPR2015-01836 (PTAB))*
  • Obtained finding of civil contempt, and $18 million in resultant damages, relating to competitor’s purported e-procurement software ‘design-around’ sold in violation of a permanent injunction implemented after a jury trial found the patents-in-suit to be valid and infringed (ePlus Inc. v. Lawson Software, 3:09-cv-620 (E.D.Va.))*
  • Negotiated prompt and favorable settlement of patent troll litigation on behalf of client Essentra Components (Symbology Innovations LLC v. Essentra Components Inc., 1:19-cv-03613 (N.D.Ill.))*

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  • The Best Lawyers: Ones to Watch in America, Litigation – Patent, Washington, DC, 2024
  • Legal 500 US, 2021


  • Federal Circuit Bar Association, Hatch Waxman Subcommittee, Chair
  • Federal Circuit Bar Association Hatch Waxman/BPCIA Sub-Committee, member
  • Court of Federal Claims Bar Association, member
  • American Intellectual Property Law Association, member

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Harvard Law School, JD, 2009
Furman University, BS, Biochemistry, 2006

US Patent and Trademark Office
US Court of Federal Claims
US Court of Appeals for the Federal Circuit
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