Private Practice

Partner, Goldman Ismail Tomaselli Brennan & Baum LLP

Associate, Goldman Ismail Tomaselli Brennan & Baum LLP

Associate, Bartlit Beck Herman Palenchar & Scott LLP

Judicial Clerkship

The Honorable John T. Noonan, Jr., U. S. Court of Appeals for the Ninth Circuit


Yale Law School

University of Notre Dame (B.A., summa cum laude)


Bar & Court Admissions

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

Photo of Brian P. O

Brian P. O'Donoghue

Partner / Chicago

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.

Of Note

Representative Litigation

In re Mirena IUD Products Liability Litigation

National coordination counsel for Bayer in federal and state litigation involving the Mirena® intrauterine device.

Vioxx Litigation

Defend Merck & Co., Inc. against allegations that its anti-inflammatory medication Vioxx® had caused heart attacks.

Alltech Assoc. v. Teledyne Instruments, Inc.

Lead counsel for Teledyne Instruments in patent litigation pending in the District of Delaware concerning chromatography instrumentation.

Visual Intelligence LP v. Optech, Inc. 

Lead counsel for Optech, Inc. in patent litigation pending in the Southern District of Texas concerning remote sensing technology.

CEATS, Inc. v. Continental Airlines, Inc. et. al. (E.D. TX)

Won summary judgment of non-infringement on behalf of defendant in a patent infringement suit before Judge Leonard Davis. Plaintiff CEATS sued over 30 defendants relating to online ticketing patents. was the only defendant to win summary judgment of non-infringement.

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 Tyco

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

In re Teflon Products Liability

Represented DuPont in more than 15 alleged intrastate class actions brought on behalf of consumers who purchased Teflon®-coated cookware. The classes were not certified.

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.

Avionica, Inc. v. Teledyne Controls, Inc.

Lead counsel for defendant in declaratory judgment action alleging certain avionics patents were invalid and plaintiff's products did not infringe.