Professionals

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  (949) 679-0052
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  [email protected]

Ryan specializes in global patent and trademark prosecution for clients of all sizes, and focuses primarily in the areas of mechanical and aerospace engineering

•  (949) 679-0052
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Ethan Feng is an associate at Umberg/Zipser where he focuses his practice in complex commercial litigation, professional liability disputes, and employment litigation.

• (949) 679-0052
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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.

• (949) 679-0052
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Mark Finkelstein is a partner at Umberg/Zipser with more than 30 years of intellectual property and complex litigation experience.

• (949) 679-0052
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  [email protected]
  

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.

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  (949) 679.0052
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Amy Lesperance Han is an associate with Umberg/Zipser and focuses her practice on complex commercial litigation. Amy has experience litigating a wide variety of complex disputes, representing clients from the discovery phase through trial and appeal.

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  (949) 679-0052
• [email protected]

Phillip R. Kaplan is a recognized leader in the Orange County legal community, and is an accomplished business trial lawyer with a record of handling his client’s most difficult cases. 

• 949.679.0052
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Nasser Khateeb is an attorney at Umberg/Zipser LLP and focuses his practice on intellectual property law, helping clients secure, protect, and grow their innovations.

• (949) 679-0052
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Ellen Kim is an Associate at Umberg/Zipser LLP where she focuses her practice in complex commercial litigation. Prior to joining the firm, Ellen was an Associate at Jones Day. Ellen also served as a law clerk to the Honorable Diana Saldaña in the United States District Court for the Southern District of Texas and to the Honorable Robert Huie in the United States District Court for the Southern District of California.

• (949) 679-0052
• [email protected]

Molly Magnuson is an experienced, results-oriented litigation attorney. Molly’s experience comes not only from working for significant clients, but also from working in some of America’s top law firms, which has created exposure to high-stakes, complex commercial litigation.

• (949) 679-0052
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Priti Phukan concentrates her practice on patent and trademark prosecution across various technology industries, including chemistry, life sciences, diagnostics, medical devices, and mechanical engineering.

• (949) 679-0052
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Marcus Quintanilla is Of Counsel at Umberg/Zipser and has over twenty years’ experience litigating and arbitrating complex domestic and cross-border cases. 

• (949) 679-0052
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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.

• (949) 679-0052
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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.

• (949) 679-0052
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Jeremy is a seasoned business litigator with over 20 years of experience handling complex commercial and trade secret disputes. He represents closely held companies in matters involving contracts, fraud, and internal business conflicts, offering practical and cost-effective legal strategies. Known for his clear guidance and results-driven approach, Jeremy helps clients navigate disputes while minimizing business disruption.

• (949) 679-0052
• [email protected]

Ryan T. Tran is an associate at Umberg/Zipser LLP, where he focuses on complex civil litigation, including real estate, business, and contract disputes. He also handles pro bono asylum cases and brings a strategic, client-focused approach to every matter.

• (949) 679-0052
• [email protected]

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.

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  (949) 679-0052
• [email protected]

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.

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Chris Wang is an associate at Umberg/Zipser, focusing on complex commercial litigation and bringing experience from his time at Gibson, Dunn & Crutcher, where he handled high-stakes litigation and investigations. He earned his J.D. magna cum laude from UC Irvine School of Law, where he held editorial and clinical roles and received multiple scholarships. He also holds a B.A. in International Affairs with a minor in Sociocultural Anthropology from George Washington University, graduating cum laude.

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  (949) 679-0052
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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.