Rosa M. Tumialán

Matthew counsels clients on invention harvesting, patent and trademark portfolio management, intellectual property acquisition, domestic and international patent and trademark prosecution, and intellectual property transactions. He has prepared and prosecuted more than 750 patent applications and appeals on behalf of clients, primarily in the mechanical, electrical, electromechanical and software arts. Additionally, Matthew conducts IP asset management for his clients, having extensive experi...

Matthew R. Carter is a lawyer recognized by Best Lawyers in the practice area of Commercial Litigation. Matthew R. practices law in Chicago, Illinois Best Lawyers has recognized Matthew R. Carter since 2023. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Matthew R. Carter is held by other lawyers.

Erin Lynch Cordier is a top attorney recognized by Best Lawyers in the practice area(s) of Gaming Law. Erin, who practices law in Chicago, Illinois, has been recognized since 2027. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Erin is held by other top lawyers in the same geographic and legal practice area.

Francis A. Citera is Co-Chair of the firm's Products Liability & Mass Torts Litigation Group and Co-Chair of the Chicago Litigation Practice. Frank has 30 years of experience defending purported class actions, toxic tort actions, and other complex litigation in both federal and state courts. He has tried many cases, including an action by the Government to enforce a unilateral administrative order, an allocation case among potentially responsible parties, and a complex product liability, ...

Adam R. Klein is a lawyer recognized by Best Lawyers in the practice area of Sports Law. Adam R. practices law in Chicago, Illinois Best Lawyers has recognized Adam R. Klein since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Adam R. Klein is held by other lawyers.

Tom is an intellectual property attorney who regularly counsels clients on patent and trademark prosecution, IP litigation, and post-grant patent challenges before the Patent Trial and Appeal Board (PTAB). His practice reflects a balance of strategic portfolio development and dispute-driven risk assessment, uniquely blending transactional work with intellectual property litigation. This integrated approach enables him to advise clients with a practical, end‑to‑end perspective on how patents a...

David W. Wirt is a lawyer recognized by Best Lawyers in the practice areas of Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law and Litigation - Bankruptcy. David W. practices law in Chicago, Illinois Best Lawyers has recognized David W. Wirt since 2016. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which David W. Wirt is held by other l...

Edward Halper is a lawyer recognized by Best Lawyers in the practice area of Banking and Finance Law. Edward practices law in Chicago, Illinois Best Lawyers has recognized Edward Halper since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Edward Halper is held by other lawyers.

Scott is a trial lawyer who concentrates his practice on complex commercial litigation, with a particular emphasis on class actions. He was formerly managing partner of the firm, and served on its Executive Committee. Scott has considerable jury and nonjury trial experience, and represents clients in state and federal courts throughout the United States. He has advocated for clients in a broad range of matters, including antitrust, fraud and business torts, health care, breach of contract and...

Joseph E. Tilson is Co-Chair of Cozen O'Connor's Labor & Employment Department and a member of the Management Committee and Board of Directors. Joe represents employers in large-scale employment litigation and labor arbitrations. In the past 35 years, he has tried more than 150 jury and non-jury cases before the full range of courts, administrative agencies and labor arbitrators. His clients include a number of the country’s largest public and private employers, and Illinois’ ...