Eric Choi

Cozen O'Connor PC

$ $$$

19th Street Northwest 1200
Washington 20036 DC US

Eric Choi concentrates his practice in complex patent cases for clients in the pharmaceutical and biotechnology industries. Eric is a registered patent attorney and focuses his practice on the representation of generic pharmaceutical companies in Hatch-Waxman litigation.

Eric is also experienced in the drafting and prosecution of patents in the pharmaceutical and medical device industries. Prior to attending law school, Eric was a chemist at Merck & Co., Inc. where he researched crystalline organic molecules and was part of multiple development teams as the lead investigator for polymorph and salt selection of drug candidates from pre-clinical to Phase III clinical trials.

Eric is also a co-inventor of U.S. Patent No. 8,513,234 entitled HIV Integrase Inhibitors and U.S. Patent Application Publication No. 2014/0206605 titled Crystal Forms of HIV Integrase Inhibitors.

Eric earned his J.D. from Chicago-Kent College of Law and received his B.S. in biochemistry from Northern Illinois University. Prior to attending Northern Illinois University Eric was in the Integrated Science Program at Northwestern University.


  • Represented Endo Pharmaceuticals Inc. and Strakan International S.à r.l. against Watson Labs’ attempt to make a generic version of Endo’s FORTESTA® product. Following a bench trial, the judge ruled in our clients’ favor on all contested issues and rejected the defendant’s claims of non-infringement, invalidity, and unenforceability. Successfully argued on appeal with the Federal Circuit affirming the trial court decision.
  • Represented Apotex Inc. and Apotex Corp. in a patent infringement action regarding Apotex’s biosimilar applications to make biosimilar versions of Amgen’s NEULASTA® and NEUPOGEN® products. We navigated Apotex through the Biologics Price Competition and Innovation Act’s “patent dance,” and in the first BPCIA case to go to trial, we obtained a verdict of noninfringement. This result was affirmed on appeal to the U.S. Court of Appeals for the Federal Circuit.


  • Chicago-Kent College of Law, J.D., 2013
  • Northern Illinois University, B.S., 2004


  • United States Patent and Trademark Office
  • Illinois
  • District of Columbia


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19th Street Northwest 1200
Washington 20036 DC US
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