Kerry L. Timbers

Kerry L. Timbers

Managing Partner

617-443-9292, ext 223
Harvard Law School
University of Missouri
B.A. with honors, magna cum laude

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  • Harvard J.D.
  • University of Missouri B.A. with honors, magna cum laude


Kerry Timbers has extensive experience trying complex patent litigations in a variety of industries including the life sciences, technology, and consumer oriented products. His trial background includes jury and non-jury cases, and arguments before the Court of Appeals for the Federal Circuit. His expertise includes participating in complex interference proceedings and inter partes reviews (IPRs) before the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office.

Kerry has been named a Best Lawyers, Super Lawyer, and a WTR100 Recommended Individual. Kerry is the Managing Partner of Sunstein LLP.


  • Kerry has handled and had significant involvement in numerous complex patent litigations covering a wide range of technologies, including, for example:
    • computer operating system architectures
    • land-line, cell-phone and VOIP telephony systems and devices
    • pharmaceuticals
    • medical diagnostic devices
    • medical devices used in surgery and treatment
    • electromechanical devices
    • x-ray inspection systems
    • consumer-oriented products, especially plastics products and plastics manufacturing processes
  • Recent and current representative cases include:
    • Exergen Corporation v. Kaz USA, Inc., United States District Court for the District of Massachusetts. Sunstein obtained a verdict of $14.6 million after a two-week jury trial for infringement of Exergen’s patents for temporal artery thermometers. The jury found infringement and confirmed the validity of every one of the twelve asserted patent claims, and awarded both lost profits and a reasonable royalty.
    • ClassCo, Inc. v. Kyocera Int’l, Inc. et al., United States District Court for the District of Massachusetts (settled, representing defendants Pantech Company, Inc. and Pantech Wireless, Inc.. against patents for cell phone technology)
    • Boston Scientific Corporation v. Cook, Inc. et al., United States District Court for the District of Massachusetts (ongoing, representing defendant Taewoong Medical Co., Ltd., against patents for endoscopic stents and stent delivery systems)
    • Softspikes, LLC et al. v. MacNeill Engineering Company, Inc.
      Trisport, Ltd. et al. v. MacNeill Engineering Company, Inc. et al.
      United States District Court for the District of Delaware (settled after favorable Markman ruling; represented MacNeill Engineering in two suits involving 3 MacNeill patents and defending against 5 other patents, concerning golf cleats and receptacles)
  • Kerry also has extensive experience in all aspects of trademark and copyright protection and litigation, representing nationally recognized firms in courts and before the Patent and Trademark Office and Trademark Trial and Appeal Board.
  • Kerry also has significant involvement in shaping and implementing strategies for the protection, licensing, and enforcement of clients’ trademark portfolios.

Professional and Community Involvement

  • He is a member of the Boston Bar Association, and has been Co-Chair of the Boston Bar Association Intellectual Property Litigation Committee, and the Co-Chair of the Boston Bar Association International Intellectual Property Law Committee.
  • He is also a member of the Boston Patent Law Association, the American Intellectual Property Law Association and the International Trademark Association, and is a Master in the Boston IP American Inn of Court.
  • He is a Fellow of the Litigation Counsel of America.


  • Best Lawyers in America©, 2016-2021 list in the field of Intellectual Property Litigation.
  • Named to the Super Lawyers® list in the practice area of intellectual property litigation 2004-2020 in Massachusetts, a list limited to the top 5 percent of attorneys in each region.
  • Named to the 2014 -2020 New England Super Lawyers Top 100 List, a listing of 100 lawyers who received the highest point totals in the Massachusetts nomination, research and blue ribbon review process.
  • Selected by World Trademark Review to the WTR1000 Recommended Individual list for enforcement and litigation as well as for prosecution and strategy.
  • Highest peer review rating by Martindale-Hubbell, based on a survey of other lawyers and judges in the community.

Bar and Court Admissions

  • He is admitted to the Massachusetts bar, as well as the bars for the U.S. Courts of Appeals for the First, Fourth and Federal Circuits and the U.S. District Courts in Massachusetts, Connecticut, Colorado, the Eastern District of Wisconsin and the Eastern District of Texas.


Exergen Corporation vs. Kaz, USA, Inc.

United States District Court for the District of Massachusetts

Sunstein’s trial team won a jury verdict for our client Exergen, resulting in a $16 million judgment against Kaz, the maker of consumer products sold under the Vicks and Braun brands. Despite Kaz’s multiple challenges to the twelve patent claims asserted by Exergen, the jury upheld the validity of all of them, and found that the forehead thermometers sold by Kaz infringed those claims. Exergen is a Watertown, MA-based manufacturer and seller of thermometers for both the professional and consumer markets.


$16 million judgment

FairWarning IP, LLC v. Iatric, Inc.; FairWarning IP, LLC v. CynergisTek, Inc.

We successfully defended clients Iatric and CynergisTek in the District Court and Federal Circuit against claims of patent infringement relating to software for detecting fraud and misuse of protected health information. Sunstein litigation group obtained judgments of patent invalidity under Section 101.

Join Our Team

Sunstein seeks talented candidates interested in joining our dynamic, motivated, and talented professional team.

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