Duane Morris LLP is a Philadelphia-headquartered, full-service U.S. and international law firm founded in 1904 by Russell Duane, Steven Heckscher, and Roland S. Morris. Chaired by Matthew A. Taylor, the firm describes itself as "a law firm with more than 900 attorneys in offices across the United States and internationally" — with a U.S. footprint spanning the East Coast, Texas, the Mountain West, and California, plus international offices in London, Singapore, Vietnam (Hanoi, Ho Chi Minh City), Shanghai, Myanmar, and joint ventures/alliances reaching Mexico and Latin America. An Am Law 100 firm since 2001, Duane Morris is known for depth in intellectual property (including patent prosecution and PTAB practice), trial and appellate litigation, real estate, corporate transactions, employment, healthcare, cannabis, and life sciences. The firm publishes an extensive LexBlog-powered thought-leadership network of more than 50 practice-area blogs, all of which expose RSS 2.0 feeds via the standard WordPress /feed/ convention. Duane Morris does not expose any public developer API, SDK, OpenAPI/AsyncAPI spec, GraphQL endpoint, webhooks, status page, or developer portal; the GitHub organization at github.com/duanemorris exists but has no public repositories. The firm's only machine-readable surfaces are the RSS feeds of its blog network.
URL: Visit APIs.json URL
- Type: Index
- Position: Consumer
- Access: 3rd-Party
- Classification: Company
- Founded: 1904
- Founders: Russell Duane, Steven Heckscher, Roland S. Morris
- Headquarters: 30 South 17th Street, Philadelphia, Pennsylvania
- Chair: Matthew A. Taylor
- Chief Operating Officer: Charles J. O'Donnell
- Lawyers: 900+
- Offices: 30+ (25 in the U.S., 6 international)
- Structure: Limited Liability Partnership (LLP)
- Revenue: $526.23 million USD (2021, per Wikipedia citing Am Law)
- Profit per Equity Partner: $1.081 million USD (2021)
- Am Law Status: Am Law 100 member since 2001; Am Law 200 #82 by gross revenue (2025); NLJ 500 #74 by size (2025)
- Positioning: "A law firm with more than 900 attorneys in offices across the United States and internationally, is asked by a broad array of clients to provide innovative solutions to today's legal and business challenges."
- Notable Achievement: 16 consecutive years of revenue growth; collaborative culture featured in the Harvard Business School case study "Duane Morris: Collaborating for Growth"
ADA Title III Compliance, Animal Law, Antitrust, Appellate, Artificial Intelligence, Banking and Finance, Bankruptcy and Business Reorganization, Benefits and Executive Compensation, Cannabis, Capital Markets, Class Action Defense, Construction, Corporate, Delaware Business Law, Discovery Strategy and Data Analytics, Education, Energy and Environmental, European Sanctions Enforcement, Fashion/Retail/Consumer Branded Products, Fintech, Franchise, Gaming, Health Law, Immigration, Insurance, Intellectual Property, International Arbitration, Labor and Employment, Lender Liability and Loan Enforcement, Life Sciences, Mergers and Acquisitions, New Markets Tax Credits and Affordable Housing, Non-Compete and Trade Secrets, Opportunity Zones, PFAS and Environmental Mass Tort, Private Client Services, Products Liability, Project Development / Infrastructure / P3, PTAB Practice, Real Estate, Securities Arbitration, Sports Law, State Attorneys General Practice, Sustainability / Resiliency / Risk Mitigation (ESG), Tax, Technology Law, Transportation / Automotive / Logistics, Trial and Litigation, White Collar Criminal Defense.
Banking and Finance, Cannabis, Construction, Education, Energy, Fashion and Retail, Gaming and Sports, Healthcare, Insurance, Life Sciences and Biotech, Manufacturing, Real Estate, Technology, Transportation.
Atlanta, Austin, Baltimore, Berwyn (satellite), Boca Raton, Boston, Chicago, Dallas, Fort Worth, Houston, Las Vegas, Los Angeles, Miami, New York, North Jersey, Philadelphia, Pittsburgh, Portland (Maine, satellite), San Diego, San Francisco, Seattle (satellite), Silicon Valley, South Jersey, Washington DC, Wilmington.
Hanoi (Vietnam), Ho Chi Minh City (Vietnam), London (UK), Myanmar (Yangon), Shanghai (China — joint venture), Singapore (Duane Morris and Selvam joint venture). Alliances in Mexico and Latin America.
| Year | Firm | Location |
|---|---|---|
| 2020-01 | Satterlee Stephens | New York |
- Markman v. Westview Instruments, Inc. — U.S. Supreme Court precedent on claim construction in patent infringement.
- Tobacco Master Settlement Agreement (1998) — represented Pennsylvania in the 46-state litigation that produced the ~$206 billion settlement with the major tobacco companies.
- Roland S. Morris — US Ambassador to Japan; founding partner
- Hon. Michael Baylson — US District Judge, Eastern District of Pennsylvania
- Hon. Gene E. K. Pratter — US District Judge
- Hon. Marjorie Rendell — US Court of Appeals for the Third Circuit
- Mark Singel — Lieutenant Governor of Pennsylvania (1987-1995)
Duane Morris runs a LexBlog/WordPress-powered blog network at blogs.duanemorris.com plus the standalone Duane Morris Institute at duanemorrisinstitute.com. Every blog exposes an RSS 2.0 feed via the standard /feed/ URL convention. Validity spot-confirmed on Class Action Defense, Cannabis Industry, Artificial Intelligence, and Duane Morris Institute feeds.
Duane Morris LLP publishes no public developer API. There is no developer portal, SDK, OpenAPI/AsyncAPI specification, JSON Schema, GraphQL endpoint, webhooks, status page, or changelog. The GitHub organization at https://github.com/duanemorris exists but holds no public repositories.
The only machine-readable surfaces produced by the firm are the RSS 2.0 feeds exposed by its LexBlog blog network — more than 50 practice and industry blogs at blogs.duanemorris.com (plus the Duane Morris Institute at duanemorrisinstitute.com), each reachable via the standard WordPress /feed/ convention. RSS validity has been spot-confirmed on the Class Action Defense, Cannabis Industry, Artificial Intelligence, and Duane Morris Institute feeds.
This repository profiles the firm itself — its practice areas, offices, leadership, and thought-leadership properties — rather than a developer-facing API surface.
Antitrust, Appellate, Arbitration, Banking, Bankruptcy, Cannabis, Capital Markets, Class Action, Construction, Corporate, Cybersecurity, Data Privacy, Education, Employment Law, Energy, Environmental, ESG, Fintech, Franchise, Gaming, Healthcare, Immigration, Insurance, Intellectual Property, International Arbitration, International Law, Labor, Law, Law Firm, Legal, Legal Services, Life Sciences, Litigation, Mergers and Acquisitions, Patents, PFAS, Private Equity, Products Liability, Real Estate, Regulatory, Securities, Sports, Sustainability, Tax, Technology, Trade Secrets, Transportation, White Collar Defense.
- Created: 2026-05-23
- Modified: 2026-05-23
FN: Kin Lane Email: kin@apievangelist.com