Brian P. O’Donoghue
Partner / Chicago

P: 312-881-5980
F: 312-380-7006

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Highlights of Brian’s litigation practice include high-profile cases in products liability, intellectual property, complex commercial litigation, and securities litigation. He has been involved in multi-state class actions, internal investigations, and litigation matters relating to individual corporate clients in a variety of industries, including pharmaceutical, energy, manufacturing, and electronics. Clients rely on Brian’s keen judgment as well as his ability to master both the key issues of the case and the often dense and difficult subject matter.

  • Sample mass tort matters include:

    In re Mirena IUD Products Liability Litigation

    Served as coordination counsel and national counsel for Bayer Healthcare Pharmaceuticals in thousands of federal and state cases involving the Mirena intrauterine device. Team excluded all plaintiff experts on Daubert and then won summary judgment in the first MDL dismissing all cases. Litigation continues in a second MDL (alleging different injuries) and in New Jersey, St. Louis, and California coordinated proceedings.

    In re Vioxx

    Defended Merck & Co., Inc. against allegations that its anti-inflammatory medication Vioxx had cause heart attacks. Specific matters include:

    • State of Louisiana v. Merck Sharp & Dohme Corp.: Represented Merck in first attorney general trial relating to Vioxx. Two week bench trial resulted in verdict for Merck.
    • Grossberg v. Merck & Co.: Represented Merck in first California state court trial involving Vioxx. Six week jury trial in Los Angeles resulted in verdict for Merck.
    • In re Vioxx MDL: Represented Merck in two separate multi-week trials alleging injuries from Vioxx in the MDL in the District of Louisiana. Both verdicts for Merck.
    • Ledbetter v. Merck & Co.: Represented Merck in Texas state court case involving Vioxx. Summary judgment on preemption grounds granted for Merck.
    • Vioxx Governmental Action Cases: National counsel in several actions brought by State Attorneys General against Merck relating to Vioxx. Negotiated settlements of most actions.
    • Vioxx Third-Party Payor Litigation: Represented Merck in lawsuits brought by individual third-party payors who allege economic losses relating to the purchase of Vioxx.
    In re Magnevist Products Liability Litigation

    National counsel for Bayer in individual state cases regarding Bayer’s Magnevist gadolinium based contrast agent used in MRI scans.

    In re Hormone Therapy Litigation

    Counsel for Wyeth in product liability litigation involving Premarin and Prempro hormone replacement therapy products alleged to cause breast cancer.

    Tanner v. Bayer Corp.

    Represented Bayer in multi-state class action product liability litigation involving isocyanates used in polyurethane applications for underground coal mining. Negotiated settlement.

    Sample intellectual property matters include:

    Alltech Associates v. Teledyne Instruments, Inc.

    Lead counsel for defendant Teledyne Instruments in multi-patent litigation brought by W.R. Grace in the District of Delaware. After winning all disputed terms at Markman hearing, a settlement was reached.

    Visual Intelligence LP v. Teledyne Optech, Inc.

    Lead counsel for defendant Teledyne Optech in multi-patent litigation pending in the Southern District of Texas. After Teledyne Optech’s summary judgment briefing was filed, a settlement was reached.

    Avionica, Inc. v. Teledyne Controls, Inc.

    Lead counsel for defendant Teledyne Controls in multi-patent declaratory judgment action pending in the Southern District of Florida. After Teledyne Controls’ summary judgment briefs were filed, a settlement was reached.

    CEATS, Inc. v. Continental Airlines, Inc. et al

    Represented defendant in multi-patent infringement suit in the Eastern District of Texas. Plaintiff sued over 30 defendants. was the only defendant to win summary judgment of non-infringement.

    Convolve et al. v. Compaq and Seagate (In re Seagate)

    Lead counsel for Compaq (now Hewlett-Packard) in patent and trade secret dispute with Convolve relating to disk drive technology in which Convolve sought hundreds of millions of dollars in damages. Retained to handle expert discovery and trial after case had been pending for several years. Won summary judgment on all patent and trade secret claims.

    Sample commercial matters include:

    Servcor v. Bayer Material Science LLC

    Counsel for Bayer in multi-party dispute in Florida state court. Following dissolution of parties’ business relationship, Plaintiff sought damages over $100 million for breach of contract, breach of fiduciary duty, negligence, fraud, and other tort and contract claims. Over three years of litigation, Bayer won three sequential motions to dismiss after which plaintiff voluntarily dismissed all claims with prejudice.

    Sportvision, Inc. et al. v. MLB Advance Media L.P.

    Currently representing defendant Major League Baseball Advanced Media in lawsuit alleging breach of contract, trade secret misappropriation, and patent infringement.

    In re Tyco

    Represented Tyco in shareholder, securities, and ERISA litigations related to former C.E.O. Dennis Kozlowski’s alleged embezzlement of company funds.

    Nicor Gas Co. v. Pappas Construction Co.

    After client lost in arbitration, represented plaintiff Nicor Gas in suit arising from defendant’s alleged repeated destruction of underground gas lines. First chaired jury trial recovering 75% of client’s damages demand.

    In re Parmalot Securities Litigation

    Represented Deloitte Touche in auditor liability litigation related to alleged financial fraud by an Italian multination dairy and food corporation. Negotiated settlement.

    • Partner, Goldman Ismail Tomaselli Brennan & Baum LLP
    • Associate, Goldman Ismail Tomaselli Brennan & Baum LLP
    • Associate, Bartlit Beck Herman Palenchar & Scott LLP
    • Yale Law School
      • Managing Editor, Yale Law and Policy Review
      • Editor, Yale Journal of Law and Technology
    • University of Notre Dame (B.A., summa cum laude)
      • Phi Beta Kappa
      • Sigma Tau Delta
      • Phi Alpha Theta
      • Student Body President
    • The Honorable John T. Noonan, Jr., U. S. Court of Appeals for the Ninth Circuit
    • Selected by Super Lawyers as an Illinois Rising Star (2014-2019)
    • Ranked by Benchmark Litigation as a Top Litigator Under 40 (2018)
    • Named to Benchmark Litigation Under 40 Hotlist (2017)
    • State of Illinois
    • U.S. Court of Appeals for the Ninth Circuit
    • U.S. District Court, Northern District of Illinois
    • U.S. Court of Appeals for the Federal Circuit