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Haynes and Boone, LLP

Debbie J. McComas

Debbie J. McComas



  • Appellate
  • Appellate Case Evaluation and Advice
  • Bankruptcy Appeals
  • Class Action Defense
  • Litigation

WSG Practice Industries


Debbie McComas has argued before the Texas Supreme Court, petitioned the United States Supreme Court, helped draft model patent jury charges for the Federal Circuit Bar Association, and defended foreign sovereigns from multiple continents. Whether before the highest courts or a trial court in rural East Texas, Debbie dedicates herself to her clients and brings practical solutions to uncommon problems.

Debbie has led teams in significant appeals and trial matters throughout the country. She argued In re Schmitz to the Texas Supreme Court, a case that set the standard for shareholder derivative suits against Texas corporations. Debbie defends foreign corporations and sovereign nations in cross-border disputes, often obtaining dismissal on jurisdictional grounds before discovery. Her extensive knowledge of both state and federal procedure and her ability to quickly grasp facts and legal issues allows her to aid her clients on a broad array of subjects, be it oil and gas or patent infringement.

Debbie is particularly active in the Federal Circuit Court of Appeals, where she has appeared in more than 25 cases, including appeals from both federal district court judgments and final written decisions from the PTAB.

A consummate advocate, Debbie is also dedicated to her community and is proud to have served as co-chair of Haynes and Boone's Pro Bono and Public Service Committee. She also serves as a member of the Board of her church. She is honored to have received the Light of Justice Award from the Texas Defender Service for her pro bono achievements.

Bar Admissions



J.D., Tulane University, 1995, cum laude; Managing Editor, Tulane Maritime Law Journal; Associate Justice, Tulane Moot Court Board
B.A., Austin College, 1990, with honors
Areas of Practice

Appellate | Appellate Case Evaluation and Advice | Bankruptcy Appeals | Class Action Defense | Energy Litigation | Intellectual Property Litigation | International | International Arbitration | Litigation | Technology and Intellectual Property Appeals

Professional Career

Significant Accomplishments

Lender liability. Ms. McComas represents lending institutions in high stakes lender liability lawsuits, including representation of Bank of America in a lawsuit brought by Adelphia Communications Corporation and its subsidiaries seeking to hold hundreds of banks liable in tort for the alleged misconduct of Adelphia's officers and directors.

International litigation. Applying her expansive knowledge of cross-border jurisdictional issues, Ms. McComas advises lending institutions on strategies for obtaining and enforcing judgments against foreign nationals both in the United States and abroad, including representation of the Export-Import Bank of the United States in international efforts to collect a more than $140 million judgment against a group of Indonesian companies.

Intellectual property. Ms. McComas is actively involved in intellectual property litigation, assisting in preservation in the trial court and participating in numerous appeals to the United States Federal Circuit. Ms. McComas was part of the trial team that recently obtained a judgment of non-infringement for Viewpointe Archive Services, LLC, a company accused of joint infringement of check-imaging technology. Further, as a member of the Federal Circuit Bar Association's model patent jury charge sub-committee, Ms. McComas was actively involved in drafting the current Federal Circuit Bar Association's Model Patent Jury Charge.

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

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