Justin S. Cohen

Justin S. Cohen

  • 214.969.1211
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  • Thompson & Knight LLP
    One Arts Plaza
    1722 Routh Street, Suite 1500
    Dallas, TX 75201 USA
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Justin Cohen focuses his practice on intellectual property litigation and counseling, primarily in the areas of software, electrical, mechanical, telecommunications, and semiconductor technologies. He has represented clients in various patent, copyright, and trademark litigation in a variety of federal district courts, before the Patent Trial and Appeal Board, and in the Trademark Trial and Appeal Board. Justin also helps clients identify, evaluate, license, and enforce their intellectual property assets.

Justin also has extensive expertise counseling companies with cybersecurity and data privacy issues. He has assisted companies by performing systematic security audits, investigating security incidents, implementing intrusion detection systems, and creating and administering system security measures for systems and networks. 


  • Defended a leading telecommunications infrastructure-equipment company and a wireless handset manufacturer in a patent infringement lawsuit related to cellular-transmission protocols in the Eastern District of Texas; obtained jury verdict of non-infringement and invalidity of all asserted patent claims
  • Defended a semiconductor developer in a Section 337 proceeding in the U.S. International Trade Commission relating to level shifter circuitry
  • Defended a major airline in numerous patent infringement lawsuits related to secure payment systems, mobile applications, airport kiosks, and encryption algorithms in Federal District Courts in Texas, Delaware, and California
  • Represented a major airline in various trademark enforcement matters, including a trademark infringement lawsuit in the Northern District of Texas
  • Represented a large non-profit organization in various trademark enforcement matters, including a trademark infringement lawsuit to enforce its famous marks in the Southern District of Florida
  • Defended a wireless handset manufacturer in several patent infringement lawsuits related to LTE, core processor functionality, and user interface features in the Eastern District of Texas
  • Defended a large data center in a copyright infringement lawsuit related to software for managing its infrastructure and cloud hosting, co-location, and website hosting services in the Eastern District of Michigan
  • Defended a manufacturer of 3D printing/rapid prototyping machines in a patent infringement lawsuit related stereolithography technology in the Eastern District of Michigan
  • Represented a client with restaurants in several states in a contested concurrent use proceeding in the Trademark Trial and Appeal Board through trial; obtained opinion from the Board granting the registration
  • Represented a plaintiff in a seven patent lawsuit against multiple defendants involving various aspects of personal computer power management
  • Drafted and prosecuted patent applications in various arts, including computer hardware, software, telecommunications, electrical, mechanical systems, and business methods for both large and small clients, including a global broadband and telecommunications company and a semiconductor innovator and manufacturer
  • Assisted a semiconductor developer in organizing and categorizing a portfolio of more than 5,000 patents and applications for valuation and licensing

Prior Experience

  • Engineering Systems Administrator, Behr America; 2002-2004
  • Adjunct Professor, Intro to Networking and Advanced Web Security Courses, Baker College; 2003
  • U.S. Army, TACOM: Secret Level Security Clearance, 1999; Computer Scientist, High Performance Computing Team, 1999-2002; Information Assurance Network Officer (IANO), Information Assurance Team, 2001-2002


  • Texas Super Lawyers® by Thomson Reuters (Intellectual Property Litigation); 2018
  • Top 100 Texas Up-and-Coming Attorneys, Texas Rising Stars® by Thomson Reuters; 2017
  • Texas Rising Stars® by Thomson Reuters (Intellectual Property); 2015-2017

Activities (Memberships/Affiliations)

  • Member, American Bar Association
  • Member, Federal Bar Association
  • Member, American Intellectual Property Law Association; Chair, Education Committee, 2015-2017; Vice-Chair, 2014 
  • Member, Dallas Bar Association; Intellectual Property Section; Vice Chair, New Lawyers Committee (2012-2014)
  • Board Member, Arts Counsel Texas
  • Board Member, Dallas Bar Association, Intellectual Property Law Section, 2017