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Umberg/Zipser LLP

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Irvine, CA
Umberg/Zipser LLP

Umberg/Zipser LLP is a premier business litigation and intellectual property 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, Umberg Zipser provides clients with unparalleled legal services. Named one of the Daily Journal’s Top Litigation Law Firms, U/Z is a go-to firm for litigation in Orange County and around the state. The firm’s lawyers are recognized as among the very bes

t in their practice areas. They are consistently named as Best Lawyers in America® and Super Lawyers®. Last year, for example, founding partner Dean Zipser was named by Best Lawyers as the Lawyer of the Year for Intellectual Property Litigation in Orange County. We pursue our clients’ objectives strategically and with maximum efficiency and flexibility across a wide array of practice areas, including intellectual property, class actions, unfair competition, environmental, real estate, and other complex business litigation, as well as white collar criminal defense.

03/08/2025

Umberg/Zipser LLP is proud to announce that seven of its partners have been included in the Southern California Super Lawyers List for 2025, a recognition reserved for only five percent of lawyers in California. In addition, Dean Zipser has been recognized again this year as a Top 50 Orange County Lawyer for the seventh consecutive year.

The following Umberg/Zipser LLP attorneys have been recognized in the Southern California Super Lawyers list, each for multiple years:

· Mark Finkelstein– Intellectual Property Litigation – 2009-2013; 2015-2025
· Scott Garner– Professional Liability: Defense – since 2015
· Phillip Kaplan– Business Litigation – 2005-2018; 2022-2025
· Carole Reagan– Business Litigation – since 2019
· Mei Tsang– Intellectual Property – since 2017
· Thomas Umberg– Business Litigation – since 2021
· Dean Zipser– Business Litigation – since 2005

In addition, Priti Phukan, Ph.D. is again recognized as a Southern California Super Lawyers “Rising Star” for Intellectual Property Law, and this is her sixth consecutive year to receive that recognition.

Super Lawyers’ annual selections are made using a patented multiphase process that includes a statewide survey of lawyers, an independent research evaluation of candidates and peer reviews by practice area. The result is a credible, comprehensive, and diverse listing of exceptional attorneys.

01/22/2025

On Thursday evening, January 16th, the Orange County Bar Association (OCBA) held its annual Judges’ Night. The Honorable Michele Bell installed our partner Mei Tsang as the 2025 OCBA President, and partner Ryan Dean as a member of the OCBA Board of Directors, together with the other 2025 OCBA officers and directors.

Mei follows in the path of U/Z partners Scott Garner and Dean Zipser, each of whom have served as OCBA presidents. At the event, Dean, a prior recipient of the prestigious Franklin G. West Award for lifetime achievements, presented this year’s award to the Hon. Gail A. Andler, Ret. Umberg/Zipser is proud of our long and continuing service to the OCBA and other professional organizations.

12/14/2024

Happy Holidays from Umberg/Zipser

12/06/2024

Umberg/Zipser LLP (U/Z) is delighted to welcome Nasser Khateeb as our newest associate attorney to our team! Nasser spent two summers with U/Z as an intellectual property law clerk, and we congratulate him on being admitted to the California Bar. He joins our growing IP practice group, helping our clients secure, protect, and grow their innovations.

Nasser combines his scientific background with legal expertise to serve clients across a range of industries, including biotechnology, neuroscience, pharmaceuticals, nutraceuticals, and engineering. To learn more about Nasser’s background visit https://shorturl.at/Qiz3k.

11/07/2024

We are proud to announce that Umberg/Zipser LLP has once again ranked as a Tier One Firm on the "Best Law Firms® in America 2025 Edition” for the Orange County Metropolitan area. For the 11th consecutive year — every year since our formation — we have been recognized for our commitment to professional excellence and our firm’s dedication to outstanding client service and legal expertise.

For 2025, U/Z achieved Tier One Rankings in Bet-the-Company Litigation, Commercial Litigation, Banking & Finance Litigation, Intellectual Property Litigation, and Real Estate Litigation, with Tier Two recognition in Copyright Law, Securities Litigation, and Professional Malpractice Plaintiffs.

To learn more about our legal services and view the full press release, visit our website at: https://shorturl.at/bDqVu.

11/01/2024

On Thursday, October 17th, the Orange County Women Lawyers Association (OCWLA) held its 48th Annual Gala at VEA/Marriott Hotel in Newport Beach, CA and Umberg/Zipser LLP was a proud sponsor.

We are pleased to announce and congratulate our partner, Mei Tsang, who was honored as Attorney of the Year for her contributions to the legal profession. We would also like to congratulate the Hon. Desirae Hutchinson for Judge of the Year, and Castle & Nicholson LLP for its recognition for Advancement of Women.

U/Z is a longtime supporter of OCWLA – an organization dedicated to advancing women in the legal profession by providing a professional network, raising awareness of discrimination and bias, and supporting charitable organizations.

09/06/2024

Umberg/Zipser LLP partners Scott Garner and Molly Magnuson will be the featured presenters on the topic of “Ethical Considerations for In-House Counsel” at the Orange County Bar Association’s upcoming Corporate Counsel Section lunch meeting on September 10, 2024. This program is approved for 1 hour of MCLE legal ethics credit and is open to all OCBA Corporate Counsel Section members.

For more information and to register, visit www.ocbar.org or view the flyer at https://www.umbergzipser.com/wp-content/uploads/2024/08/COR-Sep-Flyer.pdf.

08/20/2024

On Thursday evening, August 15th, Umberg/Zipser LLP was proud to again be a sponsor of the Raise Your Glass wine tasting and charity awards benefit. The event was organized by the Orange County Bar Association’s Charitable Fund as part of its mission to provide resources for law-related charities throughout Orange County. U/Z attorneys Dean Zipser, Scott Garner, Mei Tsang, Mark Finkelstein, Phil Kaplan, and Ryan Dean all attended this special evening at the Newport Beach Country Club to support the Charitable Fund and interact with like-minded colleagues from the Bench and Bar.

Learn more about this worthy cause at https://www.ocbacf.org/ryg/.

08/15/2024

Umberg/Zipser LLP is proud to announce that Mark Finkelstein, Scott Garner, Phillip Kaplan, Molly Magnuson, Carole Reagan, Adina Stowell, Todd Smith, Mei Tsang, Tom Umberg, and Dean Zipser each have been selected for inclusion in the 2025 edition of The Best Lawyers in America®. Additionally, Ethan Feng has again been recognized for Best Lawyers®’ “Ones to Watch” for 2025. We congratulate each of them for their outstanding legal work and for their ongoing contributions to the legal community. To learn more about this recognition, visit www.umbergzipser.com/multiple-umberg-zipser-llp-attorneys-again-recognized-by-best-lawyers-in-america-2025.

08/13/2024

On July 31st, our Project SELF intern, Edith Hernandez, and our firm administrator, Bradley Zipser, attended Project Youth OC’s 2024 Project SELF Recognition Reception, an evening celebration for the 50 interns who completed their 8-week internship journey this summer with local law firms throughout Orange County. Umberg/Zipser LLP has been a long-time supporter of Project Youth OC and was honored to have Edith at the firm as part of this year’s program. At the event, Edith received an OCTLA - Orange County Trial Lawyers Association Charitable Fund Scholarship for her dedication, hard work, and commitment to education, as well as a personalized certificate of recognition from the California State Senate, courtesy of our own Senator Tom Umberg. Congratulations Edith on a job well done!

To learn more about Project Youth OC and their mission to keep at-risk youth in school, healthy and drug-free through education, counseling, mentoring, and family strengthening, visit https://projectyouthocbf.org/.

07/02/2024

The Orange County Business Journal has once again recognized Umberg/Zipser LLP as one of Orange County's "2024 Best Places to Work." This survey and award program acknowledges and celebrates, Orange County employers that excel in creating a positive work environment and fostering employee pride, contributing to the county's economy, workforce, and businesses. Dean Zipser, the firm's managing partner, expressed immense gratitude for this recognition and stated, “We are proud to again be honored with this incredible distinction by our exceptional team.”

Learn more about Umberg/Zipser’s attorneys, legal services, and their Best Places to Work Designation, in a full press release located on our News Page at https://www.umbergzipser.com/umberg-zipser-llp-named-one-of-orange-countys-2024-best-places-to-work-by-orange-county-business-journal/.

Address

1920 Main Street, Suite 750
Irvine, CA
92614

Opening Hours

Monday	8am - 8pm
Tuesday	8am - 8pm
Wednesday	8am - 8pm
Thursday	8am - 8pm
Friday	8am - 8pm

Website

http://www.umbergzipser.com/

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Our Story

Umberg Zipser LLP 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. Named one of the Daily Journal’s Top Litigation Boutique Firms, U/Z is a go-to firm for litigation in Orange County and around the state. The firm’s lawyers are recognized as among the very best in their practice areas. They are consistently named as Best Lawyers in America® and Super Lawyers®. Last year, for example, founding partner Dean Zipser was named by Best Lawyers as the Lawyer of the Year for Intellectual Property Litigation in Orange County. We pursue our clients’ objectives strategically and with maximum efficiency and flexibility across a wide array of practice areas, including intellectual property, class actions, unfair competition, environmental, real estate, and other complex business litigation, as well as white collar criminal defense.