Counsel registry
Polsinelli
16 case appearances — 7 as plaintiff counsel · 9 as defendant counsel.
Firm overview
Polsinelli is an Am Law 100 firm with its headquarters in Kansas City, Missouri, operating with over 1,200 attorneys across more than 25 offices nationwide. As of April 2026, the firm was ranked #55 in the Am Law 100, signifying its position as a large, national legal service provider.
The firm's intellectual property litigation practice handles a diverse range of technologies, including software, information technology, electronics, mechanical devices, telecommunications, and medical devices. Polsinelli is particularly noted for its experience in Hatch-Waxman litigation concerning pharmaceuticals and biosimilars, as well as cases involving design patents and business methods. The firm also has a presence in International Trade Commission (ITC) Section 337 investigations.
Polsinelli demonstrates a balanced approach to patent litigation, appearing as counsel for both plaintiffs and defendants, though tracked cases show a slight lean toward defending operating companies. Notable outcomes include securing a trial verdict of non-infringement and invalidity for banking software provider Jack Henry & Associates against a patent troll. The firm also achieved a significant Federal Circuit win for Power2B against Samsung Electronics in inter partes review proceedings related to handheld electronic device technology in 2026, and successfully defended BATS Trading, Inc., an electronic stock exchange, in a patent infringement lawsuit related to data compression methods, obtaining an affirmed summary judgment of invalidity and non-infringement. Additionally, in 2025, Polsinelli secured an IP litigation victory for WeatherTech Direct, where a court ruled defendants were barred from asserting an invalidity defense based on IPR estoppel.
Polsinelli maintains a robust Patent Trial and Appeal Board (PTAB) practice, having successfully handled hundreds of PTAB matters and reexaminations. The firm's post-grant practice is recognized by Patexia as among the top 1% of Best Performing Law Firms in IPR. Key partners in the patent litigation group include Jay E. Heidrick, who serves as the Intellectual Property Litigation Chair, and Senior Partner Michael D. Pegues. Other prominent practitioners include Deanna Tanner Okun, recognized for her work in International Trade: Intellectual Property (Section 337), and Jason A. Wietjes, who played a leading role in the Power2B Federal Circuit victory.
Attorneys
Roles
- lead counsel5
- Lead Counsel4
- counsel2
- Counsel2
- Of Counsel1
- Local Counsel1
- Of Counsel / Co-Counsel1
- Lead Attorney1
- Counsel for Petitioner1
- of counsel1
Cases (16)
- Δ defendantBirchtech Corp. v. Evergy, Inc. et al.Justin Nemunaitis · lead counsel
- π plaintiffCandela Corporation et al. v. Nikolai TankovichJames P. Murphy · Counsel for Petitioner
- Δ defendantCorning Incorporated v. HKC Corp et al.Deanna Tanner Okun · Lead Attorney
- Δ defendantDataTreasury Corporation v. Jack Henry & Associates, Inc.Michael D. Pegues · Lead Counsel
- Δ defendantFord Motor Company v. Massachusetts Institute of Technology et al.Gregory P. Durbin · of counsel
- π plaintiffIntellectual Ventures I LLC et al. v. Fidelity National Information Services Inc. et al.Henry A. Petri, Jr. · Lead Counsel
- π plaintiffIntellectual Ventures I LLC v. Bank of America Corporation et al.Henry A. Petri, Jr. · counsel
- π plaintiffNSV Group Fzco v. BD Innovation Collective IncDarren E. Donnelly · lead counsel
- π plaintiffONE-E-WAY, INC. v. GN Audio USA, Inc.Jason A. Wietjes · lead counsel
- Δ defendantOrthosie Systems, LLC v. Track Your Truck, Inc.John C. Linderman · Lead Counsel
- π plaintiffPower2B Inc. v. SAMSUNG ELECTRONICS CO., LTD. et al.Adam Peter Daniels · Lead Counsel
- Δ defendantRARE BREED TRIGGERS, INC. et al. v. RECOIL, LLC, DBA RECOIL GUN WORKSMichael D. Pegues · lead counsel
- π plaintiffRICMIC, LLC v. Sentrics, Inc. et al.John T. Polasek · lead counsel
- Δ defendantSoftView LLC v. Apple Inc. et al.James P. Murphy
- Δ defendantStingray IP Solutions LLC v. Assa Abloy IP ABElizabeth L. DeRienzo · Counsel
- Δ defendantSun Pharmaceutical Industries Inc. v. Biofrontera Bioscience GmbHBrian J. Larivee · Counsel