Dorothy R. Auth Ph.D. 

Partner – New York
T.+1 212 504 6018
200 Liberty Street
New York, NY 10281 V-CARD

Dr. Dorothy Auth is the head of Cadwalader's Intellectual Property Practice. Dorothy has more than 25 years of experience in complex patent litigation, as well as licensing, patent procurement, and intellectual property counseling in the United States and abroad. Her experience spans diverse industries, including biotechnology, pharmaceutical, and medical devices, as well as consumer products, computers, and other mechanical devices.

Dorothy coordinates global intellectual property procurement and enforcement strategies for her clients to maximize their protected field. In this area, Dorothy’s practice includes U.S. and international client counseling and opinions regarding patents, trademarks, copyrights, and trade secrets. Her international experience includes coordinating patent infringement trials and hearings between the U.S. and different European jurisdictions including trials seeking preliminary relief and cross-border injunctions, as well as IPRs, nullity, cancellation and oppositions proceedings on patent rights.

Dorothy litigates in U.S. Federal Courts and in international arbitrations conducted under the WIPO rules.

Dorothy also addresses intellectual property diligence issues, advising clients on the validity of target patents and performing clearance analysis on the patents of competitors to render freedom-to-operate opinions.

At the firm, Dorothy is the chair of the Technology Committee. Dorothy was the Partner Chair of the Women’s Leadership Initiative for over five years.

Dorothy is a past President of the New York Intellectual Property Law Association. Dorothy has been listed as an "IP Star" in the 2017-2020 editions of Managing Intellectual Property magazine, the guide to the world's leading IP law firms and practitioners. She has also been recognized in Euromoney Legal Media Group’s Guide to the World's Leading Women in Business Law.


Orca Health, Inc. v. 3D4Medical Ltd., et al. (D. Utah) (Settled Prior to Filing Answer)
3D4Medical Ltd., et al. v. Orca Health, Inc. (S.D. Cal.) (Settled Prior to Filing Answer)
Represented 3D4Medical Ltd. in actions against Orca Health, Inc. In one action, she defended 3D4Medical in Utah Federal District Court where Orca Health alleged over 10 state and federal tort claims, including unfair competition, trade secret misappropriation, and infringement of its trademarks, trade dress and patents.  Before discovery began, we filed multiple motions to dismiss the complaint under rule 12(b)(6) as well as a motion to disqualify plaintiff’s counsel and to invalidate the asserted patents as being directed to ineligible subject matter.  In addition, we filed a separate lawsuit in the Southern California Federal District Court against Orca Health for copyright infringement, trade dress infringement, unfair competition and breach of obligations under its End User License Agreement with 3D4Medical.  After having already dismissed one of the two patents from case and just before the hearing on the Utah preliminary motions, a favorable settlement of both cases was reached.


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Dorothy R. Auth Ph.D. 


  • U.S. District Court, Southern District of New York
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals, 2nd Circuit
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, District of New Jersey
  • New Jersey
  • New York


  • St. John's University School of Law
    J.D., 1996
  • Tufts University
  • Rutgers University
    B.A., 1985


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