Intellectual Property
1 Ranked Lawyer
Firm PROFILE
AddyHart LLC
USA 2026
Rankings
Leading firm in USA 2026
Ranked Department
Ranked Department
Ranked Individual
Ranked Individual
Top figures
12
Lawyers
6
Partners
4
Offices
Content provided by AddyHart LLC
Overview
Provided by AddyHart LLC
Founded by former AmLaw 100 attorneys, AddyHart is a boutique firm handling complex IP litigation and corporate counsel for clients from Fortune 1000 companies to emerging businesses. The firm litigates before U.S. District Courts, the PTAB, the Court of Federal Claims, and the Federal Circuit, with deep experience across software, pharma, automotive, and electronics. Led by Meredith Martin Addy and Robert P. Hart, AddyHart delivers sophisticated, business-focused legal strategy.
Industry sectors (9)
- Software
- Avionics
- Electronics
- Defense
- Automotive
- Pharmaceuticals
- Bioengineering
- Entertainment
- Corporate
Capabilities (13)
- Appeals Representation
- Patent Litigation
- Court of Federal Claims Litigation
- Commercial Litigation
- Inter Partes Reviews (PTAB)
- Pharmaceutical Litigation
- Intellectual Asset Portfolio Management
- Transactions and M&A
- Technology Licensing
- Securities Law
- Entertainment Law
- Regulatory Compliance
- Business Law
Key people
Provided by AddyHart LLC
Meredith Martin Addy
President & Co-Founder
Robert P. Hart
Co-Founder & Partner
Charles A. “Chad” Pannell III
Partner
Michael K. Kelly
Partner
Gregory B. Gulliver
Partner
Scott D. Paul
Partner
Tom J. Filarski
Senior Counsel
James B. Hatten
Senior Counsel
Janet Pioli
Senior Counsel
Paul Tauger
Senior Counsel
Work & experience
Provided by AddyHart LLC
AddyHart's practice spans patent, trademark, and copyright litigation across U.S. district courts, with particular strength in Hatch-Waxman pharmaceutical disputes, software, semiconductors, avionics, and automotive systems. The firm maintains a prominent Federal Circuit appellate practice, with two former Federal Circuit clerks on the team. They also handle reexamination, IPR & PGR proceedings, and advises growth-stage and mid-market companies on corporate, transactional, and licensing matters.
Notable work
Provided by AddyHart LLC
Pharmaceutical Patent Litigation
Defeated patents on Restasis®, Latisse®, and Effient® in complex Hatch-Waxman and PTAB proceedings.
Appellate Reversals:
Led 100+ Federal Circuit appeals, securing reversals across hardware, software, chemical, and life sciences matters.
PTAB
Led coordinated PTAB and district court litigation, leveraging IPRs in complex pharmaceutical and technology disputes.
Ranked Offices at AddyHart LLC
Provided by AddyHart LLC
Ranked Departments at AddyHart LLC (1)
Ranked Individuals at AddyHart LLC (1)
Illinois
Meredith Martin Addy
Intellectual Property
View profile
Top figures
12
Lawyers
6
Partners
4
Offices
Content provided by AddyHart LLC
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