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
    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
    Admitted1990, Pennsylvania; U.S. Court of Appeals, Third Circuit; U.S. District Court, Eastern District of Pennsylvania
    Memberships Federal Bar Association (Member: Treasurer, Eastern District of Pennsylvania Chapter); Philadelphia Bar Association Commission on Judicial Selection and Retention (Member: Investigative Division); American Bar Association (Member: Section of Litigation; Co-Chair: Intellectual Property Litigation Committee and Trial Evidence Committee, 2009-2012).


    David J. Wolfsohn is an intellectual property litigator who has represented both defendants and plaintiffs in patents, copyright, licensing, trademark, unfair competition/Lanham Act and trade secret cases in jury trials, bench trials and arbitrations. He obtained the largest indirect-profits copyright award ever ($30.4 million) in The Graham Company v. USI MidAtlantic; a $70 million settlement of a patent-licensing and inventor ownership dispute; and other seven- and eight-figure settlements on behalf of plaintiffs. He has also obtained numerous settlements for nominal amounts in cases on the defense side, in which the plaintiffs were seeking tens of millions of dollars in damages.

    Chambers USA cited client sources describing Mr. Wolfsohn's "wonderful combination of technical knowledge and ability to connect with a jury and clients." 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, has served on the Section of Litigation's Trial Evidence Committee from 2009 to 2012 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.

    Representative Matters

    · The Graham Company v. USI MidAtlantic & Haughey (E.D. Pa. 2011) Obtained $30.4 million judgment in copyright case involving copying of insurance manuals.

    · Kensey Nash Corp. v. St. Jude Medical. Obtained settlement valued at $70 million in patent-licensing and patent ownership dispute over medical devices.

    · TruePosition v. Andrew Corp. (Del. Super. Ct. 2011). Obtained high seven figure settlement in patent licensing dispute.

    · 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.

    · 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.

    · Aramark v. Crothall Health Services et al. (E.D. Pa.). Obtained favorable settlement in software copyright infringement case.

    · ReSearch Pharmaceutical Sales v. MDS Pharma, Inc. (Montgomery County Court of Common Pleas). Represented defendant in trade secrets case; obtained favorable settlement.

    · Aramark v. Morton and Crothall Health Services (Montgomery County Court of Common Pleas). Represented defendant; preliminary injunction denied in trade secrets case.

    · Murray v. Gemplus et al. (E.D. Pa.). Obtained favorable settlement in patent attorney malpractice case on behalf of patent law firm.

    · McGee Industries v. Kidd (E.D. Pa.). Obtained favorable settlement on behalf of chemist accused of using chemical formulas.

    · 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.

    · 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.

    Areas of Practice

    · Intellectual Property Litigation

    · Patents

    · Copyrights

    · Trademarks

    · Unfair Competition

    · Trade Secrets


    · Duane Morris LLP
    - Partner, 2013-present

    · Woodcock Washburn LLP
    - Partner 2005-2013

    · Hangley Aronchick Segal Pudlin & Schiller
    - Associate, 1989-2005

    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

    Honors and Awards

    · Listed in Chambers USA: America's Leading Lawyers for Business, 2007-2013

    · Listed in the Best Lawyers in America for Intellectual Property Litigation, 2007-2013

    · Named Best Lawyers ' Philadelphia Lawyer of the Year in Intellectual Property Litigation, 2012

    · Listed as a Pennsylvania Super Lawyer for Intellectual Property Litigation, 2004-2013

    · AV® Preeminent™ Peer Review Rated by Martindale-Hubbell

    Civic and Charitable Activities

    · Astral Artistic Services
    - Board Member

    · Swarthmore Borough Authority
    - Board Member

    Speaking Engagements

    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


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    Office Information

    David J. Wolfsohn

    30 South 17th Street
    PhiladelphiaPA 19103-7396


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