Since 1985

intellectual property prosecution,
litigation, and counseling.

600+ Patents

successfully registered
domestically & worldwide.

10K+ Trademarks

successfully registered
domestically & worldwide.

Intellectual Property

Is not just our livelihood,
it's our passion.

Recent News:

Retirement of Marvin Kleinberg

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Recent News:

Marshall Lerner and Daniel Malkin delivered a presentation to undergraduate, doctoral, and postdoctoral students at Harvard

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Recent News:

Marshall Lerner was a Judge of Presentations of Business Plans in the UCLA GAP Anderson Program

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Recent News:

Marshall Lerner delivered a presentation to undergraduate, doctoral, and postdoctoral students at Harvard

Read More


Kleinberg & Lerner

Kleinberg & Lerner, LLP opened in 1985 with one goal in mind: to successfully assist its clients in intellectual property matters in an effective and efficient manner.

We help our clients identify, protect and maximize their intellectual property assets. We take pride in making our clients happy, whether it’s before the United States Patent and Trademark Office or in a court of law. Our clients include global corporations, partnerships, sole proprietors, entrepreneurs, startups, inventors, designers, and authors. With decades of experience in intellectual property matters of all types, we strive to protect and maintain our clients’ intellectual property as if it’s our own.

We work hard and genuinely enjoy enabling our clients to acquire, license, protect and enforce their intellectual property. Over the last several decades, we have acquired a reputation for outstanding work, effective counseling and for building strong, long-lasting, mutually beneficial relationships with our clients. We review the client’s intellectual property and product line to formulate offensive and defensive intellectual property strategy. Our attorneys are highly client-focused and strive to provide the best work product and advice to our clients.

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Patents Registered

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Trademarks Obtained

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Satisfied Clients


Kleinberg & Lerner

We Know Intellectual Property Law

Unlike most law firms, we focus primarily on intellectual property matters. This allows our attorneys to gain significantly more intellectual property experience than many attorneys at other firms. Most attorneys at K&L are registered patent attorneys with the United States Patent and Trademark Office. Additionally, some of our attorneys have been USPTO patent examiners and worked as in-house counsel for global corporations.

Many intellectual property firms focus solely on prosecution. Our firm does prosecution and litigation. Our partners have successfully tried jury trials and argued intellectual property cases before federal and state courts of appeal. We believe that having a large breadth of understanding of intellectual property prosecution and litigation is important in successfully representing our clients, even if they only need assistance in one area.

We Know Science

Our attorneys have excellent credentials, some attorneys being former engineers and having technical degrees in electrical engineering, mechanical engineering, physics, biochemistry and molecular and cell biology.

Reasonable Rates for Superb Representation

Our fees are reasonable compared to other intellectual property firms. Over the years, we have discovered that the best way to make our clients happy is through results. We provide personal, thorough and creative representation that would normally be expensive.