David J. Wolfsohn

Phone215 979 1866

Peer Rating
AV® Preeminent

Client Rating

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Experience & Credentials Ratings & Reviews

Practice Areas

  • Intellectual Property Litigation
  • Patents
  • Copyrights
  • Trademarks
  • Unfair Competition
  • Trade Secrets
Contact InfoTelephone: 215 979 1866
Fax: 215 689 2739
University Beloit College, B.A., 1974; Villa Schifanoia Graduate School of the Fine Arts, M.M., 1976; Manhattan School of Music, Doctor of Musical Arts, 1984; Order of the Coif
Law SchoolUniversity of Chicago Law School, J.D., cum laude, 1988
AdmittedPennsylvania; U.S. District Court for the Eastern District of Pennsylvania; Supreme Court of the United States; U.S. Court of Appeals for the Eleventh Circuit; U.S. Court of Appeals for the Third Circuit

Professional Activities

•American Bar Association
- Section of Litigation
-- Co-Chair, Intellectual Property Litigation Committee
-- Co-Chair, Trial Evidence Committee, 2009-2012
•Federal Bar Association
- Treasurer, Eastern District of Pennsylvania Chapter
•The Copyright Society of the U.S.A.
- Philadelphia Chapter Chair, 2007-2009
•Philadelphia Bar Association Commission on Judicial Selection and Retention
- Member, Investigative Division
•Philadelphia County Court of Common Pleas
- Arbitrator


David J. Wolfsohn is an intellectual property litigator who has represented both defendants and plaintiffs in patent, copyright, licensing, trademark, unfair competition/Lanham Act and trade secret cases in jury trials, bench trials and arbitrations. He recently obtained a defense verdict for the H.J. Heinz Company in a jury trial over the idea for the Dip and Squeeze and won the largest indirect-profits copyright award ever ($30.4 million) in The Graham Company v. USI MidAtlantic.

Chambers USA cited client sources describing Mr. Wolfsohn's wonderful combination of technical knowledge and ability to connect with a jury and clients and praising him for being “absolutely fearless in discovery and the courtroom.” In 2012, he was named Philadelphia Lawyer of the Year in Intellectual Property Litigation by Best Lawyers in America. Mr. Wolfsohn serves as the co-chair of the ABA's Intellectual Property Litigation Committee, and has served as the co-chair of the ABA's Trial Evidence Committee. He also serves as the treasurer of the Federal Bar Association's Eastern District of Pennsylvania Chapter and was the Philadelphia Chapter Chair of The Copyright Society of the U.S.A. from 2007 to 2009.

Mr. Wolfsohn earned his J.D. in 1988 from the University of Chicago Law School, cum laude, and he was elected to the Order of the Coif. After law school, Wolfsohn served as a law clerk to the Honorable Walter K. Stapleton of the United States Court of Appeals for the Third Circuit. Before attending law school, he received a doctorate in classical piano from the Manhattan School of Music. He earned his B.A. in 1974 from Beloit College.


•Duane Morris LLP
- Partner, 2013-present
•Woodcock Washburn LLP
- Partner 2005-2013
•Hangley Aronchick Segal Pudlin & Schiller
- Associate, 1989-2005

Honors & Awards

•Listed in Best Lawyers Greater Philadelphia, 2016
•Listed in Managing Intellectual Property's IP Stars, 2015
•Listed in Chambers USA: America's Leading Lawyers for Business, 2007-2015
•Listed in the Best Lawyers in America for Intellectual Property Litigation, 2007-2016
•Listed as a Pennsylvania Super Lawyer for Intellectual Property Litigation, 2004-2015
•Named Best Lawyers' Philadelphia Lawyer of the Year in Intellectual Property Litigation, 2012
•AV Preeminent Peer Review Rated by Martindale-Hubbell

Civic and Charitable Activities

•Astral Artistic Services
- Board Member
•Swarthmore Borough Authority
- Board Member

Selected Speaking Engagements

•Speaker, Lessons from Recent Trade Secret Cases, DuPont & Widener University School of Law IP CLE Seminar, October 2012
•Speaker, Top Ten Mistakes to Avoid in Depositions, ABA Section of Litigation Annual Meeting, Miami, Florida, April 2011
•Speaker, Copyright for the General Practitioner, New York County Bar Association
•Speaker, eDiscovery: Philadelphia Law Department CLE 'Boot Camp, ' July 2008
•Speaker, Deposition Basics, ABA Section of Litigation Annual Meeting, Atlanta, Georgia, April 2008
•Speaker, An Argument by Any Other Name: How to 'Argue' Permissibly in Opening Statements, ABA Annual Meeting, San Francisco, California, August 2007

Reported CasesRepresentative Matters: Wawrzynski v. H.J. Heinz Co., et al. (W.D. Pa.) 2015 jury trial; defense verdict in case in which plaintiff claimed Heinz used his ideas in Heinz's Dip and Squeeze ketchup package. Yellow Pages Photos, Inc. v. Ziplocal LP and Yellow Pages Group, LLC (M.D. Fla.) 2014 jury trial of a copyright case in which plaintiff claimed $1.5 billion in damages; award was $123,000 against client; attorneys' fees denied for plaintiff due to small recovery. Currently on appeal to the 11th Circuit. Obtained on behalf of the Graham Company, a commercial insurance broker, a settlement in which the company received $1.1 million and a consent injunction barring a former employee from soliciting clients and most prospects for two years. The Graham Company v. USI MidAtlantic & Haughey (E.D. Pa. 2011) Obtained $30.4 million judgment in copyright case involving copying of insurance manuals. deCode v. Hakonarson et al. (E.D. Pa 2007). Obtained favorable settlement on behalf of The Children's Hospital of Philadelphia and four scientists in trade secret/non-compete case. US Office Products v. Allied Office Supplies Inc. et al. (D. Del.). Obtained preliminary injunction and $5.8 million settlement in corporate raid case involving theft of trade secrets on behalf of $1 billion office products company. TruePosition v. Andrew Corp. (Del. Super. Ct. 2011). Obtained high seven figure settlement in patent licensing dispute. Nixon v. Commonwealth, 576 Pa. 385, 839 A.2d 277 (2003). Pro bono representation of rehabilitated ex-felons challenging constitutionality of employment ban; Supreme Court held ban unconstitutional. Galfand Berger v. Shor Levin & DeRita (E.D. Pa.). Obtained favorable settlement representing law firm/author of book in copyright infringement case involving posting of book on competitor's website.

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Office Information

David J. Wolfsohn

30 South 17th Street
PhiladelphiaPA 19103-7396


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