Mark A. Steiner

Mark A. Steiner: Attorney with Duane Morris LLP AV stamp icon
Attorney Awards


Mark A. Steiner has over three decades of experience representing clients in protecting, enforcing and defending their important intellectual property rights , with a focus on trademark and copyright law . Mr. Steiner offers clients a strong combination of trial experience, counseling, enforcement, procurement and licensing expertise in matters concerning trademarks, trade identity, Internet domain names, copyrights, trade secrets and unfair competition. He has represented companies ranging in size from start-ups to Fortune 500 in a wide variety of industries, including e-commerce, computer hardware and software, networking, retail, architectural and engineering-design services, personal-care products, sporting goods, clothing, toys and games, food and beverage, hotels and restaurants. He serves as intellectual property counsel to companies at various stages of development, from inception to maturity. Mr. Steiner regularly assists clients in the management and enforcement of domestic and international trademark portfolios with the understanding that companies’ brands are almost always their most valuable assets.

Before entering private practice, Mr. Steiner served as a Deputy City Attorney for the City and County of San Francisco and was an instructor at the University of California - Hastings College of the Law.

Mr. Steiner is a trained mediator by the International Trademark Association (INTA), is listed on the INTA Panel of Neutrals, and presently serves on INTA's Emerging Issues Committee. He is a former adjunct professor of intellectual property law at the Universite Paris Ouest Nanterre La Defense School of Law and also served as faculty chair for many years for the Practising Law Institute's Global Trademark and Copyright program.

Mr. Steiner is a 1979 graduate of the University of California, Hastings College of the Law, where he was an editor of the Hastings Communications and Entertainment Law Journal, and a graduate, with high honors, of the University of California at Davis.


•Duane Morris LLP
- Partner, 2011-present
•Townsend and Townsend and Crew LLP
- Partner, 1983-2010
•San Francisco City Attorney
- Deputy City Attorney, 1980-1983

Honors and Awards

•Listed in the 2019 edition of the World Trademark Review 1000 list of the World's Leading Trademark Professionals as one of the top trademark lawyers in Litigation

Chambers USA: America's Leading Lawyers for Business, Recognized Practitioner 2014 and 2015

•Listed in 2012-2019 editions of World Trademark Review 1000 list of the World's Leading Trademark Professionals as one of the top trademark lawyers in Prosecution and Strategy.

•Listed in Expert Guides Best of the Best 2012 USA-Trademark Law
•Listed in Northern California Super Lawyers, 2011 and 2012
•Annual Listing in Managing Intellectual Property Guide to the World's Leading Trademark Law Practitioners
•AV Preeminent Peer Review Rated by Martindale-Hubbell

Board Memberships

•San Francisco Chamber of Commerce Board Member
•Lowell High School Alumni Association Board of Directors

Civic and Charitable Activities

•Lowell Alumni Association Board Member

Publications and Speaking Engagements

Selected Publications

• Trump Versus Daniels: A Storm Brews Over Copyright, San Francisco/Los Angeles Daily Journal

• Brand Enforcement: How to Stop a Trademark Infringement, Accuchex Blog

• The In-N-Outs of Brand Protection, Accuchex Blog

• Brand Selection: Choosing a Distinctive and Protectable Name, Accuchex Blog

Evolve: Trademarks and Intellectual Property, Duane Morris LLP, Summer 2014

• Facebook Goes to Trial in Defense of 'Timeline 'Feature, Bloomberg
•Intellectual Property Roundtable participant, California Lawyer and Daily Journal
• Q&A: The Trademark Professional's Forum on the Trademark Dilution Revision Act, NameProtect Trademark Insider
• Madrid Protocol Presents Mixed Opportunity, Daily Journal Supplement
• Making Sense of Madrid, IP Law & Business
•Findlaw Interview regarding the Madrid Protocol, Corporate Counsel Center
• What Happens When You Name a Company 'Codegrok?' Investor's Business Daily
• A New Frontier in Brand Protection, Marketing Management
• Parody of Copyrighted Material: Infringement or Fair Use? Intellectual Property Today
• Law Offers 3 Types of Protection for Plants, Agri-Times
• Careful Selection of Trademarks Can Avoid Monetary Damages, Marketing News

Selected Speaking Engagements

•Speaker, Legal Issues Around Brand Protection, Business Leadership Council, San Francisco, March 13, 2019

•Speaker, Legal Issues Around Brand Protection, Bay Area Branding, Licensing, IP, & Strategic Services Affinity Group, San Francisco, January 22, 2019

•Speaker, 2014 Developments in Workplace Law and Practice, Duane Morris Employment, Benefits and Immigration Practice Group, Silicon Valley, May 21, 2014
•Speaker, Trademark Selection, Protection and Enforcement, 5th Annual Best Practices for Owning & Operating a Winery Conference, Santa Rosa, California
•Speaker, 'SUPER' Trademarks, All Hands Meeting, Santa Clara, California
•Speaker, A Legal Framework to Protect Your Designs, American Apparel & FootwearAssociation Material World & Technology Solutions Program, Los Angeles
•Speaker, Do You Really Own Your IP? CONNECT: Frameworks Workshop, San Diego
•Speaker, Proving Trademark Confusion: How In-House Counsel Can Help Make the Case, California State Bar IP Section program on Intellectual Property Issues for In-House Counsel
•Speaker, Intellectual Property Enforcement of Trademarks and Copyrights, CaliforniaState Bar IP Section program on Intellectual Property Issues for In-House Counsel

(Also at San Francisco Office)

Areas of Practice (3)

  • Intellectual Property
  • Trademark and Copyrights
  • Anti-Counterfeiting

Education & Credentials

Contact Information:
415 957 3036  Phone
415 358 4738  Fax
University Attended:
University of California, Davis, B.A., with high honors, 1976
Law School Attended:
University of California, Hastings College of Law, J.D., Editor, Hastings Communications and Entertainment Law Journal, 1979
Year of First Admission:
California; U.S. District Court for the Northern District of California; U.S. District Court for the Southern District of California; U.S. District Court for the Eastern District of California; U.S. District Court for the Central District of California

Professional Activities

•American Bar Association
•American Intellectual Property Law Association
•Bar Association of San Francisco
- Past Chair, Intellectual Property Committee
•International Trademark Association
- Alternative Dispute Resolution Committee

Birth Information:
San Francisco, California, October 29, 1954
Reported Cases:
Representative Matters: Obtained from the United States Patent and Trademark Office (USPTO) a trademark registration for the shape of a bottle of vodka by assembling evidence showing the bottle had acquired distinctiveness or secondary meaning.; Represented well-known consumer brand client in litigation to prevent a competitor from using a trademark that incorporated the essential component of the client's trade identity. Settled the case on terms very favorable to the client.; Successfully filed Letter of Protest with United States Patent and Trademark Office (USPTO) which resulted in USPTO denying registration of litigation opponent's trademark. Won opposition to attempted registration of client's trademark by squatter in China.; Succeeded in having knock-off of client's website in Russia taken down.

Peer Reviews

A Martindale-Hubbell Peer Rating reflects a combination of achieving a Very High General Ethical Standards rating and a Legal Ability numerical rating.

*Peer Reviews provided before April 15, 2008 are not displayed.

Palo Alto, California

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