Litigation strategy before the next filing
The firm evaluates forum, remedy exposure, evidence needs, settlement strategy, and appeal risk before a major litigation step is taken.
Intellectual Property Litigation Law Firm
Focused representation in patent, trademark, copyright, trade secret, licensing, NDA, and Federal Circuit disputes.
20+ yearsIP litigation experience
80+ federal casesas lead counsel
DC · NY · NJFederal-court focused practice
Why Keyhani LLC
A litigation-only IP boutique.
Keyhani LLC represents clients when IP rights, confidential information, licenses, NDA obligations, or related business conflicts are already in dispute.
Federal litigation focus
The practice includes patent, trademark, copyright, trade secret, IP licensing, NDA breach, pharmaceutical patent, Federal Circuit, and related commercial/IP disputes.
Clear service boundaries
The firm handles disputes over existing rights and obligations. Patent prosecution, trademark registration, filing, and drafting services are outside the litigation practice.
Practice Areas
Intellectual property disputes the firm handles.
The firm litigates disputes over existing rights, agreements, confidential information, and court or appellate proceedings. Filing and prosecution services are outside the practice.
Patent Litigation
Federal patent disputes involving infringement, claim construction, venue, damages, injunctions, pharmaceutical patents, and appellate preservation.
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Patent Infringement
Claims involving accused products, claim language, prior art, technical evidence, infringement contentions, and damages theories.
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Federal Circuit Appeals
Appeals involving claim construction, dispositive rulings, final written decisions, injunctions, damages, and preserved trial issues.
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Trademark Litigation
Trademark infringement, trade dress, dilution, false association, unfair competition, marketplace, packaging, and brand disputes.
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Copyright Litigation
Disputes involving software, images, packaging, music, creative works, digital content, DMCA issues, and fair use.
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Trade Secret Litigation
Misappropriation, source code, customer information, employee departures, confidentiality obligations, and emergency relief.
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IP Commercial Litigation
Business disputes involving licenses, royalties, field-of-use limits, IP-linked agreements, technology, partners, or competitors.
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IP Dispute Resolution
Disputes requiring litigation judgment, settlement strategy, forum analysis, business-risk assessment, or pre-suit strategy.
View IP dispute resolutionAttorney Leadership
Attorney-led IP litigation representation.
Clients work with a focused litigation team led by attorneys whose credentials and experience are tied to federal IP disputes, including plaintiff- and defense-side matters involving pleadings, discovery, claim construction, trial, Federal Circuit appeals, arbitration, and settlement.
Founder and Lead Counsel
Darius Keyhani
Darius Keyhani brings 20+ years of IP litigation experience, 80+ federal cases as lead counsel, Federal Circuit experience, U.S. Supreme Court bar admission, and an LL.M. from NYU School of Law.
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Member and Co-Owner
Frances Stephenson
Frances Stephenson is a member and co-owner of Keyhani LLC. Her verified credentials include a J.D. magna cum laude from SUNY Buffalo School of Law, selection as one of six Research and Writing Fellows, and New York bar admission.
View Frances StephensonOffice and Courts
A Washington, DC office and a federal IP litigation practice nationwide.
From its Washington, DC office, Keyhani LLC represents U.S. and international clients in federal IP disputes in courts nationwide, appearing pro hac vice with local counsel where a court requires it. Its primary regional focus is New Jersey and the New York metro area, and the firm regularly handles Federal Circuit appellate work.
Washington, DC
Principal office at 1050 30th Street NW, Washington, DC 20007.
New Jersey and New York Metro
New Jersey and the New York metro area are the firm's primary regional client base for federal IP disputes.
Federal Circuit
Federal Circuit appellate experience supports appeal-aware strategy in patent and related IP litigation.
Common Questions
Questions before contacting the firm.
Short answers for scope, court coverage, and how to begin a case evaluation.
Does Keyhani LLC handle patent prosecution or trademark registration?
No. Keyhani LLC is a litigation-focused firm. Patent prosecution, trademark registration, standalone filing, drafting, and prosecution work are outside the firm's practice.
What kinds of IP disputes does the firm litigate?
The firm handles patent, trademark, copyright, trade secret, IP licensing, NDA breach, pharmaceutical patent, Federal Circuit, and related commercial/IP disputes.
What courts and markets does Keyhani LLC serve?
Keyhani LLC represents clients in federal courts nationwide and serves international clients, working from its Washington, DC office with a primary regional focus on New Jersey and the New York metro area. Where a matter is in another court, the firm appears pro hac vice with local counsel as required.
How do I start a case evaluation?
Contact the firm with the demand letter, complaint, order, agreement, deadlines, key documents, and a short description of the business issue.
Discuss your IP matter with litigation counsel.
If your matter involves a patent, trademark, copyright, trade secret, IP agreement, NDA, court filing, or Federal Circuit appeal, contact the firm to discuss whether it fits the litigation practice.