Professionals

We never lose sight of our clients' objectives, and we work creatively to achieve them.
~ Dean Zipser

Nicole Ballew Chang, Ph.D.

(949) 679-0052
nballewchang@umbergzipser.com

Nicole Ballew Chang is a patent agent who focuses her practice on patent prosecution in biotechnology, life sciences, and chemical arts.

Brent S. Colasurdo

(949) 679-0052
bcolasurdo@umbergzipser.com

Brent S. Colasurdo is an associate with Umberg/Zipser where he focuses his practice on complex commercial litigation.

Ryan Dean

(949) 679-0052
rdean@umbergzipser.com

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

Martin Fessenmaier, Ph.D.

(949) 679-0052
mfessenmaier@umbergzipser.com

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.

Mark A. Finkelstein

(949) 679-0052
mfinkelstein@umbergzipser.com

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

Scott B. Garner

(949) 679-0052
sgarner@umbergzipser.com

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.

Leah A. Hamlin

(949) 679-0052
lhamlin@umbergzipser.com

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.

Priti Phukan, Ph.D.

(949) 679-0052
pphukan@umbergzipser.com

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

Carole E. Reagan

(949) 679-0052
creagan@umbergzipser.com

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.

Todd W. Smith

(949) 679-0052
tsmith@umbergzipser.com

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.

Adina W. Stowell

(949) 679-0052
astowell@umbergzipser.com

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

Mei Tsang

(949) 679-0052
mtsang@umbergzipser.com

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.

Thomas J. Umberg

(949) 679-0052
tumberg@umbergzipser.com

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.

Vikki L. Vander Woude

(949) 679-0052
vvanderwoude@umbergzipser.com

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.

Dean J. Zipser

(949) 679-0052
dzipser@umbergzipser.com

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.

Ethan Feng

(949) 679-0052
ethanfeng@umbergzipser.com

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