Exceptional Quality With The Personal Service Of A Boutique
Umberg/Zipser's team of accomplished professionals are consistently recognized as among the very best in their
practice areas.
LEARN MORE

Experience

Integrity

Results

civic-50-oc
ocba
americas-top-100
best-law-firms-badge-small-2020
super-lawyers-2020
best-law-firms-badge-small-2020
best-law-firms-badge-small-2019
super-lawyers-2019
best-law-firms-badge-small-2019
best-law-firms-badge-small-2018
super-lawyers-2018
best-law-firms-badge-small-2018
best-law-firms-badge-small-2017
super-lawyers-2017
best-law-firms-badge-small-2017
best-law-firms-badge-small-2016
super-lawyers-2016
best-law-firms-badge-small-2016
best-law-firms-badge-small-2015
super-lawyers-2015
best-law-firms-badge-small-2015
Previous
Next

Firm Overview

About Us

Umberg/Zipser LLP is a premier business litigation and intellectual property boutique law firm. Drawing on decades of experience in some of the nation’s largest and most prestigious law firms, as well as national and state government service, our lawyers provide exceptional work with the unparalleled personal service of a boutique.  

Our Culture

Umberg/Zipser believes in giving back, both to our community and to our profession. We regularly handle pro bono matters, and our attorneys devote countless hours to supporting — and leading — professional and community organizations. It would be difficult to find another firm in Orange County, regardless of size, that can boast the number of community leaders that exist at Umberg/Zipser.

Why Us?

By combining big-firm experience with small-firm efficiencies, we can handle complex matters for large companies, but we also are nimble enough to represent small companies and entrepreneurs. Our clients come to us because we deliver the highest quality work product together with extraordinary service.

LEARN MORE ABOUT US

Practice Areas

We Have the Experience to Handle a Wide Array of Matters

Commercial Litigation
We handle a wide variety of commercial litigation matters, including breach of contract, fraud, unfair competition, and other business torts.
LEARN MORE
Intellectual Property
We provide national and international patent and trademark prosecution services, and we litigate matters involving patents, trademarks, copyrights, false advertising, and trade secrets.
LEARN MORE
Lawyer Liability & Legal Ethics
Our attorneys have extensive experience defending law firms and lawyers against claims by former clients and third parties.
LEARN MORE
Class Actions
We have handled scores of class action cases in state and federal courts involving a wide variety of claims and subject areas.
LEARN MORE
Government & Regulatory
We develop effective, practical strategies to address the governmental issues that impact our clients.
LEARN MORE
White Collar Investigations & Defense
Our attorneys have deep experience in defending and investigating allegations of white collar criminal conduct.
LEARN MORE
Commercial Litigation
We handle a wide variety of commercial litigation matters, including breach of contract, fraud, unfair competition, and other business torts.
LEARN MORE
Intellectual Property
We provide national and international patent and trademark prosecution services, and we litigate matters involving patents, trademarks, copyrights, false advertising, and trade secrets.
LEARN MORE
Lawyer Liability & Legal Ethics
Our attorneys have extensive experience defending law firms and lawyers against claims by former clients and third parties.
LEARN MORE
Class Actions
We have handled scores of class action cases in state and federal courts involving a wide variety of claims and subject areas.
LEARN MORE
Government & Regulatory
We develop effective, practical strategies to address the governmental issues that impact our clients.
LEARN MORE
White Collar Investigations & Defense
Our attorneys have deep experience in defending and investigating allegations of white collar criminal conduct.
LEARN MORE
VIEW ALL PRACTICE AREAS

Professionals

We Have Exceptional Attorneys Who Stand Ready to Serve Our Clients

rebeca-irene-edit-008-320

Nicole Ballew Chang, Ph.D.

Nicole Ballew Chang is a patent agent who focuses her practice on patent prosecution in biotechnology, life sciences, and chemical arts.
READ MORE
rebeca-irene-Brent-014-320

Brent S. Colasurdo

Brent S. Colasurdo is an associate with Umberg/Zipser where he focuses his practice on complex commercial litigation.
READ MORE
rebeca-irene--020-320

Ryan Dean

Ryan specializes in global patent and trademark prosecution for clients of all sizes, and focuses primarily in the areas of mechanical and aerospace engineering
READ MORE
rebeca-irene--Martin-01-320

Martin Fessenmaier, Ph.D.

Martin has almost two decades of experience in domestic and International patent prosecution, working in the fields of biochemistry and molecular biology, bioinformatics, medical devices, organic chemistry, and general mechanical arts.
READ MORE
rebeca-irene-Mark-005-320

Mark A. Finkelstein

Mark Finkelstein is a partner at Umberg/Zipser with more than 25 years of intellectual property and complex litigation experience.



READ MORE

rebeca-irene-Scott--009-320

Scott B. Garner

Scott B. Garner is a partner at Umberg/Zipser in Irvine, California. He represents clients in complex business litigation matters, with a particular focus on professional liability disputes and ethics counseling.



READ MORE

rebeca-irene--Leah-008-320

Leah A. Hamlin

Leah Hamlin is an associate at Umberg/Zipser where she focuses her practice in the areas of complex commercial litigation, intellectual property disputes and employment litigation.
READ MORE
rebeca-irene-Priti-011-320

Priti Phukan, Ph.D.

Priti Phukan concentrates her practice on patent and trademark prosecution across various technology industries, including chemistry, life sciences, diagnostics, medical devices, and mechanical engineering.
READ MORE
Carole_Reagan_345x515

Carole E. Reagan

Carole E. Reagan’s practice focuses on intellectual property and complex commercial litigation. She has successfully represented business clients across a diverse array of industries.
READ MORE
rebeca-irene-Todd-008-320

Todd W. Smith

Todd Smith’s practice focuses on complex business litigation in state and federal courts representing companies and individuals in partnership disputes, shareholder and derivative litigation, real estate disputes, trade secrets, and unfair competition claims.
READ MORE
Adina_Stowell_345x515

Adina W. Stowell

Adina Stowell specializes in complex litigation involving corporate, commercial, trade secret, and real estate disputes in both state and federal courts.



READ MORE

rebeca-irene-Mei-003-320

Mei Tsang

Mei has an international intellectual property practice focused on helping clients formulate their IP strategy, and shepherding their IP through various business cycles to achieve their business goals worldwide.
READ MORE
Tom_Umberg_320

Thomas J. Umberg

Thomas J. Umberg has extensive trial experience in both federal and state courts and has been selected as a “Best Lawyer” for the prestigious publication “The Best Lawyers in America®” in commercial litigation for 12 consecutive years.
READ MORE
rebeca-irene-edit-018-320

Vikki L. Vander Woude

Vikki has a broad and diverse professional background having worked in large and small law firms, as in-house counsel, and as a research attorney for the courts, which gives her a unique perspective and skill set that is of immeasurable benefit to clients.
READ MORE
Dean-Zipser-Orange-County-Lawyer

Dean J. Zipser

Dean J. Zipser is a recognized leader in the Orange County legal community, having served as President of the Orange County Bar Association (OCBA) along with many other professional leadership positions.



READ MORE

Ethan Feng

Ethan Feng

Ethan Feng is an associate at Umberg/Zipser where he focuses his practice in complex commercial litigation, professional liability disputes, and employment litigation.



READ MORE

NEWS and EVENTS

Umberg/Zipser in the Community

View All News

CAREERS

Come Join Our Amazing Team

If you are an exceptional attorney who thrives on delivering top-notch client service, and would enjoy practicing law in a small, collegial environment, we invite you to contact us to learn more about how we can support your career growth. Umberg/Zipser is proud of its diversity, and is an equal opportunity employer.

CONTACT US

Umberg Zipser

1920 Main Street, Suite 750 Irvine CA 92614

Contact Us

If you are interested in retaining our services, or you want to learn more about Umberg/Zipser, we look forward to hearing from you.  Please note that merely sending us an email does not create an attorney-client relationship, and anything you send to us will not be confidential or privileged unless we have agreed to represent you. 

Umberg/Zipser is a premier business litigation and intellectual property boutique.  Drawing on decades of experience in some of the nation’s largest and most prestigious law firms, as well as national and state government service, Umberg/Zipser provides clients with unparalleled legal services. 

Linkedin Rss Envelope

Navigation

Contact Us

Copyright © 2020 - Umberg/Zipser | All rights reserved. Copyright & Legal Disclaimer