Practices

Patent Office Litigation

Top Law Firm for PTAB Proceedings

Why Cooley

  • Top PTAB firm with 300+ inter partes review and covered business method review proceedings

  • 100+ PTO inter partes and ex parte reexams

  • 30+ patents invalidated in the past two years

  • Employ post-grant proceedings as a key strategy for patent litigation defense; regularly obtain stays of concurrent litigation pending PTAB proceedings

  • Track record of swiftly knocking out competitor and third-party patents across a broad range of industries

  • Experience on both sides: equally skilled in invalidating third-party patents and in defending patent challenges brought by competitors

  • Significant experience addressing issues concerning whether certain documents qualify as prior art, secondary considerations as evidence of patentability and real-party-in-interest and privity defenses

  • Particularly skilled in briefings and oral hearings before the PTAB/BPAI, PTO petitions and obtaining expert declarations

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Top five law firm for PTAB proceedings

Docket Navigator

Recognition

  • Managing IP: Patent Contentious and PTAB Litigation "IP Star" 
  • National Law Journal: IP Hot List
  • Corporate Counsel: Top 10 Law Firm for Patent Litigation (2016)
  • Docket Navigator: Top 5 Law Firm for PTAB Proceedings and Top 10 Law Firm for Patent Litigation Defense 
  • The American Lawyer: IP Litigation Department of the Year finalist (2023, 2025) 
  • The Recorder: IP Litigation Department of the Year 
  • Legal 500 US: Patent Litigation 
  • Financial Times: Top 5 Most Innovative Law Firm

Law Firm Leaderboard Top 3

On its inaugural Law Firm Leaderboard list, Cooley was ranked #3 overall, further spotlighting our large footprint in high-profile litigation.             

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