About Us

Founded in 1957, we are recognized worldwide as a leading intellectual property law and litigation firm.  We also represent clients in the areas of advertising, media & technology; customs, international cargo & regulatory compliance; corporate and commercial law; real estate law; trusts & estates; and military law.  We have achieved extraordinary results for many of our clients in these and other areas.  We strive to provide top-notch service and practical and cost-effective expertise, advice, and representation. 

We work collaboratively, staff projects efficiently, and maintain long-term relationships with our clients who appreciate our responsiveness, dedication, experience, and sophistication.  Our firm has a collegial atmosphere and employs attorneys and professional staff who speak Spanish, French, Haitian Creole, Russian, Serbian, Hebrew, Mandarin, Hindi/Punjabi,  Romanian, and other languages. 

Honors & Rankings

We are repeatedly recognized by various publications, including Chambers USA, The Legal 500, IP Stars, Best Lawyers in America, and Super Lawyers as one of the world’s leading IP firms for trademark, copyright, litigation, and related fields.  

Our Clients

We are fortunate to represent leading businesses in the finance, fashion, sports, tech, publishing, and restaurant and hospitality industries, among many other industries. Our clients include multi-national companies, start-ups, universities, non-profit organizations and museums, as well as executives, entrepreneurs, artists, and entertainers.

Pro Bono

Our long history of providing pro bono services is a reflection of who we are and what we aspire to be.

Diversity and Inclusion

We strongly believe that diversity and inclusion at all levels of our firm greatly increases the value and abilities of our lawyers and staff and the services we offer to clients. Our on-going commitment to diversity extends beyond our office walls as we are dedicated to improving diversity within all facets of the legal profession, and importantly, further into our communities.

Mansfield Certification Plus Cowan, Liebowitz & Latman is proud to announce that the firm has achieved Mansfield Certification Plus! The firm will continue to build teams that reflect the diversity of its clients and communities while providing exceptional service.

Social Responsibility

We are mindful of our obligation to be socially responsible.  In this regard, we undertake community service activities, environmental sustainability initiatives, and direct philanthropy.


Our alumni teach at leading law schools; work as in-house counsel at major corporations, non-profit organizations, and start-up companies; and have held major positions at the U.S. Copyright Office and U.S. Patent & Trademark Office, founded innovative companies, and created and run or worked at leading intellectual property law firms in other countries.


Our firm was founded in 1957 with the goal of providing sound advice, quality work, and highly-responsive, personalized service.  Our founders (Marvin Cowan (NYU and Harvard Law School), Sidney Liebowitz (Yale and Columbia Law School), Lazar Emanuel (NYU and Harvard Law School), and Alan Latman (NYU and Harvard Law School)) and attorneys who joined the firm over the years, including Arthur Greenbaum (University of Pennsylvania and Harvard Law School), Lewis Cowan (Harvard and Harvard Law School), Baila Celedonia (Carnegie-Mellon and Brooklyn Law School), David Goldberg (Yale Law School), William Borchard (Princeton University and Columbia Law School), Lynn Fruchter (University of Pennsylvania and Harvard Law School), Richard Dannay (Harvard and Harvard Law School), Morton Goldberg (Harvard and Yale Law School) and others, developed a collaborative and comfortable working environment in which our attorneys and staff have been, and continue to be, able to grow professionally and personally.  Over the years, we have had many significant accomplishments in the fields of trademarks, copyrights, patents, customs, commercial law, estate planning, real estate, military law, and other areas.  We have handled numerous landmark cases, including cases before the U.S. Supreme Court, federal and state appellate courts, and the U.S. Trademark Trial and Appeal Board. Our impressive history is attributable to our visionary founders, talented attorneys, hard-working staff, and dedicated friends, clients, colleagues, and alumni in the U.S. and around the world.

What We Do

We represent clients of all sizes across a broad range of industries. The boutique size of our firm, and the breadth of our practice capabilities, allow us to provide a multidisciplinary approach in a cost-effective manner.

See Our Practices ›
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