Darius Keyhani
Darius Keyhani is the founder of Keyhani LLC and lead counsel for the firm's federal intellectual property litigation practice. His verified credentials include 20+ years of IP litigation experience, 80+ federal cases as lead counsel, and Federal Circuit appellate experience.
For matter review, send pleadings, demand letters, patents or registrations, agreements, technical materials, damages information, deadlines, and court filings.Federal IP Litigation Led by Senior Trial Counsel
Darius's practice is built around federal intellectual property disputes: patent infringement, trade secrets, copyrights, trademarks, related commercial claims, and appeals that can determine the direction of the case.
Patent Litigation
Federal district-court patent disputes involving infringement claims, accused products, claim construction, experts, damages, trial strategy, and settlement posture.
View patent litigationFederal Circuit Appeals
Appeal strategy tied to claim construction, summary judgment, trial record, patent damages, standards of review, and issue preservation.
View appellate litigationTrade Secret Litigation
Confidential-information disputes involving alleged misappropriation, employee departures, emergency relief, preservation, and business-risk assessment.
View trade secret litigationTrademark and Copyright Disputes
Brand, creative-work, licensing, unfair-competition, and related commercial disputes connected to federal IP litigation strategy.
View trademark litigationFounder-Level Judgment for Federal IP Disputes
Darius Keyhani founded Keyhani LLC as an IP litigation boutique and leads the firm's patent and intellectual property litigation practice. His work is centered on federal disputes where early decisions about claims, forums, evidence, injunction risk, damages, experts, and appeal preservation can shape the entire matter.
Over more than two decades, Darius has served as lead litigation and trial counsel in more than 80 federal cases. His practice includes patent, trade secret, copyright, trademark, unfair-competition, and related commercial disputes, with Federal Circuit appellate experience as a core credibility signal.
Darius's background also includes teaching patent and intellectual property law in South Korea to graduate students, including lawyers and Korean Intellectual Property Office examiners. He was the founding editor of the SUNY Buffalo Intellectual Property Law Journal and has been interviewed or invited as a commentator by CNN, Fox Business, and LAW360.
Contact Darius Keyhani Through Keyhani LLC
For new matters, Keyhani LLC reviews the dispute, claims, parties, forum, deadlines, technical record, business objective, and appeal posture before the first substantive assessment.
Relevant IP Litigation Pages
Choose the related practice path that matches the dispute.
Patent Litigation
For patent holders and accused infringers facing federal district-court patent disputes, claim construction, expert issues, damages, and trial strategy.
Patent litigation attorneyFederal Circuit Appeals
For appeals involving patent judgments, claim construction, summary judgment, standards of review, damages, and issue preservation.
Federal Circuit appellate counselTrade Secret Litigation
For disputes involving alleged misappropriation, employee departures, source materials, confidential information, emergency relief, and NDA-linked claims.
Trade secret litigation attorneyWhere is Darius Keyhani admitted?
Darius is admitted in the District of Columbia, New Jersey, the U.S. Court of Appeals for the Federal Circuit, the U.S. Supreme Court bar, the Southern District of New York, Eastern District of New York, Western District of New York, and District of New Jersey.
What does the U.S. Supreme Court credential mean?
Darius is admitted to the U.S. Supreme Court bar and has cert-petition experience. He has not argued a case before the Supreme Court, and the firm does not claim Supreme Court oral arguments or case outcomes.
Does Keyhani LLC handle patent prosecution or trademark filing?
No. Keyhani LLC is a litigation-focused firm. Patent prosecution, trademark registration, and standalone administrative proceedings are outside its practice.
Discuss an IP Litigation Matter
If your matter involves patent infringement, a Federal Circuit appeal, trade secret misappropriation, trademark or copyright claims, NDA breach, or a related commercial conflict, contact Keyhani LLC to identify the litigation posture and next step.